Mechanical Engineer - Advanced Manufacturing
Whether you call yourself a mechanical engineer, a manufacturing engineer, or just someone who loves turning designs into hardware, if you want to own how the world’s most advanced electric motors get built, read on.
About H3X Technologies
At H3X, we're building the most advanced electric motors in the world, powering the future of sustainable aviation, marine, industrial, and defense applications. Our motors range from 30 kW to 1 MW+ and are up to 3x lighter than competing platforms, driving a step change in electric propulsion technology.
Our team brings together some of the best minds from aerospace, defense, and motorsports, with deep expertise in electric machines, power electronics, material science, and advanced manufacturing. We're a small, fast-moving team doing hard engineering that matters, and we're looking for people who want to do the best work of their careers alongside us.
Why this role is different
You'll have real ownership from day one, direct access to the people making decisions, and the chance to see your work go from whiteboard to hardware, in flight, on the water, or in the field, in a matter of months, not years. We move fast, we learn fast, and we celebrate wins together. You've probably worked somewhere that moves fast and builds hard things or you're hungry to.
About the Role:
H3X is hiring Mechanical Engineers focused on advanced manufacturing across all levels (Associate to Staff) to develop and scale our manufacturing processes from early-stage prototypes through full production. You'll do hands-on process development and production support, bridging R&D and sustained manufacturing so new technologies can be built reliably, efficiently, and at scale. You'll take full ownership of a program or production area such as Stator Manufacturing, Rotating Assemblies, or Final Assembly, supporting both new product introductions and production scaling of existing products. Some positions lean more toward process development; others toward tooling, fixtures, and equipment.
What you'll do
Develop, prototype, and mature novel manufacturing processes from concept through production deployment.
Lead manufacturing readiness for new products: process development, work instructions, tooling design, subscale testing, prototype builds, and the transition from prototype to production.
Own capacity planning and scalability for your production area; find the bottlenecks and implement the equipment, tooling, and workflow improvements that support forecasted demand.
Design, validate, and deploy production tooling, fixtures, and assembly aids in SolidWorks to improve quality, throughput, and operator ergonomics.
Resolve production issues through root-cause analysis and drive non-conformance investigations and CAPA to eliminate recurring defects.
Build the systems, tooling, and workflows that make the whole team faster: the goal is to save the team time, not add process for its own sake.
Partner with design, supply chain, quality, and operations to bake manufacturability into the product from the start.
What everyone needs
Degree in Mechanical Engineering or similar (or equivalent hands-on experience)
Strong grasp of engineering fundamentals, mechanical drawings, and GD&T
CAD proficiency, SolidWorks preferred
Bias to action, an ownership mentality, and a first-principles approach to problems
Excellent written and verbal communication, strong attention to detail, and high emotional intelligence: you collaborate respectfully and empathetically
Fundamentally curious and eager to learn quickly
Associate / early-career
You're a scrappy, hard-working self-starter who learns fast, runs toward problems, and would rather build and iterate than wait for perfect instructions. Internship, project, or team experience with real hardware is a plus.
Senior / Staff
You bring deep manufacturing experience scaling complex assemblies. Just as important, you build systems that save the team time rather than create overhead. You can walk a production area, identify which systemic improvements will actually move the needle, prioritize ruthlessly, and drive them to completion.
Additional Nice to Have Experience:
Experience scaling complex assemblies to higher production volume
Experience designing manufacturing floor layouts
Understanding of electric motors or high-voltage systems
Experience working in a startup environment
Experience with ISO9001 and/or AS9100 standards
Compensation:
$90,000 - $200,000 based on experience (Associate to Staff Level). Offers are calibrated to level and experience.
Benefits
Robust benefits including medical, vision, dental, disability, and life insurance offerings, an employee equity incentive program, and a 401k program. Additional benefits include our gym membership stipend and outdoor recreation reimbursement program. We have an execution-based culture with flexible hours, flexible time off, 12 company holidays (including our company ski trip), monthly company events, and weekly catered team lunch on Fridays.
Our Values
Be Relentless Never give up, persevere until the job is done. Run toward problems, not away from them. Grit is key.
Gain insight through humility Approach every challenge with a learner’s mindset. Stay open to feedback, listen to others, and deepen your understanding through self-awareness. Put your ego aside and seek the truth in every discussion, especially when leading others.
Distill & Simplify Eliminate unjustified complexity and simplify wherever possible, whether in requirements, design, or execution. Use first principles thinking to distill every problem to its essence. Less is more.
Find your flow Engage fully and work with intention. Find the rhythm and deep focus that lets you do your best work. Discover your Ikigai - where your strengths, passions, and purpose meet and drive your personal fulfillment and team success. That is when the magic happens.
SEND (Solve, Evolve, Nail It, Deliver) Devise the best solution with the information at hand, test it, learn from it, and iterate quickly until you nail it. Nothing works perfectly the first time, but you should never hit the same issue twice. Stay laser-focused on solving customer problems and delivering solutions that create real value.
Equal Opportunity Employer
H3X is an equal opportunity-affirmative action employer and considers all qualified applicants for employment based on business needs, job requirements and individual qualifications, without regard to race, color, religion, sex, age, disability, sexual orientation, gender identity or expression, marital status, past or present military service or any other status protected by the laws or regulations in the locations where we operate.
","descriptionPlain":"Mechanical Engineer - Advanced Manufacturing\n\nWhether you call yourself a mechanical engineer, a manufacturing engineer, or just someone who loves turning designs into hardware, if you want to own how the world’s most advanced electric motors get built, read on.\n\n\n\nAbout H3X Technologies\n\nAt H3X, we're building the most advanced electric motors in the world, powering the future of sustainable aviation, marine, industrial, and defense applications. Our motors range from 30 kW to 1 MW+ and are up to 3x lighter than competing platforms, driving a step change in electric propulsion technology.\n\nOur team brings together some of the best minds from aerospace, defense, and motorsports, with deep expertise in electric machines, power electronics, material science, and advanced manufacturing. We're a small, fast-moving team doing hard engineering that matters, and we're looking for people who want to do the best work of their careers alongside us.\n\n\n\nWhy this role is different\n\nYou'll have real ownership from day one, direct access to the people making decisions, and the chance to see your work go from whiteboard to hardware, in flight, on the water, or in the field, in a matter of months, not years. We move fast, we learn fast, and we celebrate wins together. You've probably worked somewhere that moves fast and builds hard things or you're hungry to.\n\n\n\nAbout the Role:\n\nH3X is hiring Mechanical Engineers focused on advanced manufacturing across all levels (Associate to Staff) to develop and scale our manufacturing processes from early-stage prototypes through full production. You'll do hands-on process development and production support, bridging R&D and sustained manufacturing so new technologies can be built reliably, efficiently, and at scale. You'll take full ownership of a program or production area such as Stator Manufacturing, Rotating Assemblies, or Final Assembly, supporting both new product introductions and production scaling of existing products. Some positions lean more toward process development; others toward tooling, fixtures, and equipment.\n\n\n\nWhat you'll do\n\n - Develop, prototype, and mature novel manufacturing processes from concept through production deployment.\n\n - Lead manufacturing readiness for new products: process development, work instructions, tooling design, subscale testing, prototype builds, and the transition from prototype to production.\n\n - Own capacity planning and scalability for your production area; find the bottlenecks and implement the equipment, tooling, and workflow improvements that support forecasted demand.\n\n - Design, validate, and deploy production tooling, fixtures, and assembly aids in SolidWorks to improve quality, throughput, and operator ergonomics.\n\n - Resolve production issues through root-cause analysis and drive non-conformance investigations and CAPA to eliminate recurring defects.\n\n - Build the systems, tooling, and workflows that make the whole team faster: the goal is to save the team time, not add process for its own sake.\n\n - Partner with design, supply chain, quality, and operations to bake manufacturability into the product from the start.\n\n\n\nWhat everyone needs\n\n - Degree in Mechanical Engineering or similar (or equivalent hands-on experience)\n\n - Strong grasp of engineering fundamentals, mechanical drawings, and GD&T\n\n - CAD proficiency, SolidWorks preferred\n\n - Bias to action, an ownership mentality, and a first-principles approach to problems\n\n - Excellent written and verbal communication, strong attention to detail, and high emotional intelligence: you collaborate respectfully and empathetically\n\n - Fundamentally curious and eager to learn quickly\n\n\n\nAssociate / early-career\n\nYou're a scrappy, hard-working self-starter who learns fast, runs toward problems, and would rather build and iterate than wait for perfect instructions. Internship, project, or team experience with real hardware is a plus.\n\n\n\nSenior / Staff\n\nYou bring deep manufacturing experience scaling complex assemblies. Just as important, you build systems that save the team time rather than create overhead. You can walk a production area, identify which systemic improvements will actually move the needle, prioritize ruthlessly, and drive them to completion.\n\n\n\nAdditional Nice to Have Experience:\n\n - Experience scaling complex assemblies to higher production volume\n\n - Experience designing manufacturing floor layouts\n\n - Understanding of electric motors or high-voltage systems\n\n - Experience working in a startup environment\n\n - Experience with ISO9001 and/or AS9100 standards\n\n\n\nCompensation:\n\n$90,000 - $200,000 based on experience (Associate to Staff Level). Offers are calibrated to level and experience.\n\n\n\nBenefits\n\nRobust benefits including medical, vision, dental, disability, and life insurance offerings, an employee equity incentive program, and a 401k program. Additional benefits include our gym membership stipend and outdoor recreation reimbursement program. We have an execution-based culture with flexible hours, flexible time off, 12 company holidays (including our company ski trip), monthly company events, and weekly catered team lunch on Fridays.\n\n\n\nOur Values\n\nBe Relentless Never give up, persevere until the job is done. Run toward problems, not away from them. Grit is key.\n\nGain insight through humility Approach every challenge with a learner’s mindset. Stay open to feedback, listen to others, and deepen your understanding through self-awareness. Put your ego aside and seek the truth in every discussion, especially when leading others.\n\nDistill & Simplify Eliminate unjustified complexity and simplify wherever possible, whether in requirements, design, or execution. Use first principles thinking to distill every problem to its essence. Less is more.\n\nFind your flow Engage fully and work with intention. Find the rhythm and deep focus that lets you do your best work. Discover your Ikigai - where your strengths, passions, and purpose meet and drive your personal fulfillment and team success. That is when the magic happens.\n\nSEND (Solve, Evolve, Nail It, Deliver) Devise the best solution with the information at hand, test it, learn from it, and iterate quickly until you nail it. Nothing works perfectly the first time, but you should never hit the same issue twice. Stay laser-focused on solving customer problems and delivering solutions that create real value.\n\n\n\nEqual Opportunity Employer\n\nH3X is an equal opportunity-affirmative action employer and considers all qualified applicants for employment based on business needs, job requirements and individual qualifications, without regard to race, color, religion, sex, age, disability, sexual orientation, gender identity or expression, marital status, past or present military service or any other status protected by the laws or regulations in the locations where we operate.\n\n\n\n","compensation":{"compensationTierSummary":null,"scrapeableCompensationSalarySummary":null,"compensationTiers":[],"summaryComponents":[]}},{"id":"95dab57c-ac20-4862-b33d-1c17eda062c4","title":"Senior Procurement Specialist","department":"Manufacturing","team":"Manufacturing","employmentType":"FullTime","location":"Louisville, Colorado","shouldDisplayCompensationOnJobPostings":false,"secondaryLocations":[],"publishedAt":"2026-08-26T17:41:24.430+00:00","isListed":true,"isRemote":false,"workplaceType":"OnSite","address":{"postalAddress":{"addressRegion":"Colorado","addressCountry":"United States","addressLocality":"Louisville"}},"jobUrl":"https://jobs.ashbyhq.com/h3x-technologies/95dab57c-ac20-4862-b33d-1c17eda062c4","applyUrl":"https://jobs.ashbyhq.com/h3x-technologies/95dab57c-ac20-4862-b33d-1c17eda062c4/application","descriptionHtml":"About H3X Technologies
H3X is building America's advanced electric motor company, powering next-generation platforms in aerospace, defense, and marine. Our integrated motor drives deliver 12+ kW/kg, roughly 3x the power density of competing solutions. We're now scaling to megawatt-class systems, with customers working on everything from supersonic aircraft to turbine power generation for AI datacenters.
Our team brings together engineers and operators from aerospace, defense, and motorsports, with deep expertise in electric machines, power electronics, material science, and advanced manufacturing. We're a small, fast-moving team doing hard engineering that matters, and we're looking for people who want to do the best work of their careers alongside us.
About the role
Our team at H3X looking for a Sr. Procurement Specialist to execute day-to-day purchasing as we scale our manufacturing and introduce multiple new products. You will place and manage POs with approved suppliers, keep our supplier data current and reliable, and work on forecasting and supplier performance. This role is a great fit for someone who's detail-oriented, proactive by nature, and wants to grow into a broader supply chain or category management career as the function matures.
You are a strong fit if you've worked in procurement or buying for a complex, low/mid-volume manufacturer, you take ownership of accuracy and follow-through, and you like the idea of helping shape processes (forecasting models, category management, supplier KPIs) rather than just executing against them.
What you will do:
Purchasing Execution
Place POs with approved suppliers for needed parts, maintaining a proactive rather than reactive posture on lead times and material availability
Own the overall accuracy and reliability of PO data, quantities, pricing, dates, and terms
Track deliveries against POs and follow up with suppliers to keep orders on schedule
Supplier Management
Maintain and continuously update the supplier database, including onboarding new suppliers
Ensure supplier certifications and NDAs are current and properly tracked
Assist in maintaining supplier relationships & partnerships
Actively participate in building out a Supplier KPI database to track and improve supplier performance
Planning & Forecasting
Develop forecasting models together for distribution to key suppliers
Support long-term planning efforts by keeping PO and supplier data organized and accessible
Flag supply risks
Coordinate with other team members across manufacturing engineering, production, and others
Cross-Functional Collaboration
Work with Leadership to support cash flow planning based on PO data and timing
Contribute to the development of category management as the supply chain function matures (e.g., Power Electronics, Electromagnetics, and other key commodity areas)
Partner with engineering, production, and inventory teams as needed to keep purchasing aligned with real-time needs
Reporting
Provide monthly reporting on purchasing activity, supplier performance, and open risks
What we are looking for:
5+ years of experience in buying, procurement, or purchasing, ideally in complex mechanical, electromechanical, or electronics manufacturing
Strong attention to detail and a track record of maintaining accurate, reliable purchasing data
Experience managing supplier relationships and tracking supplier documentation (certifications, NDAs, etc.)
Comfortable working with ERP/MRP systems for PO issuance and tracking
Strong communication skills and ability to work cross-functionally with finance, engineering, and operations
A proactive mindset, comfortable flagging risk early rather than waiting for it to become urgent
Preferred Experience
Experience with Manufacturo or similar ERP/MRP platforms
Exposure to forecasting or demand planning processes
Familiarity with electronics or electromechanical component categories (e.g., power electronics, electromagnetics)
Compensation & Benefits
Salary Compensation Range: $88,000 - $120,000
Why H3X
Joining H3X means working on hard, meaningful problems with a skunkworks-style team that's laser-focused on building exceptional products. We're deeply vertically integrated and have a very tight design-build-test loop, which lets us move from concept to hardware at unmatched speed. We've gone from idea to shipping product in less than two months.
We're a small, highly skilled team where everyone carries real responsibility and shares an extreme ownership mentality. We stay focused on the critical path, keep bureaucracy to a minimum, and structure everything around delivering results. You'll learn and grow faster here than you would anywhere else.
You'll work alongside world-class engineers and builders who are pioneering electric motor technology at scale on some of the coolest programs in the industry, from supersonic aircraft to power generation for AI datacenters. If you want your contributions to be visible and your work to directly shape American reindustrialization, you'll feel at home here.
Our team provides robust benefits including medical, vision, dental, disability, & life insurance offerings, employee equity incentive program, & 401k program. Additional benefits include our gym membership stipend and outdoor recreation reimbursement program. We have an execution based culture, with flexible hours, flexible time off, 12 company holidays (including our company ski trip), monthly company events, and weekly catered team lunch on Fridays.
Our Values
Be Relentless Never give up, persevere until the job is done. Run toward problems, not away from them. Grit is key.
Gain insight through humility Approach every challenge with a learner’s mindset. Stay open to feedback, listen to others, and deepen your understanding through self-awareness. Put your ego aside and seek the truth in every discussion, especially when leading others.
Distill & Simplify Eliminate unjustified complexity and simplify wherever possible, whether in requirements, design, or execution. Use first principles thinking to distill every problem to its essence. Less is more.
Find your flow Engage fully and work with intention. Find the rhythm and deep focus that lets you do your best work. Discover your Ikigai - where your strengths, passions, and purpose meet and drive your personal fulfillment and team success. That is when the magic happens.
SEND (Solve, Evolve, Nail It, Deliver) Devise the best solution with the information at hand, test it, learn from it, and iterate quickly until you nail it. Nothing works perfectly the first time, but you should never hit the same issue twice. Stay laser-focused on solving customer problems and delivering solutions that create real value.
Equal Opportunity Employer
H3X is an equal opportunity-affirmative action employer and considers all qualified applicants for employment based on business needs, job requirements and individual qualifications, without regard to race, color, religion, sex, age, disability, sexual orientation, gender identity or expression, marital status, past or present military service or any other status protected by the laws or regulations in the locations where we operate.
","descriptionPlain":"About H3X Technologies\n\nH3X is building America's advanced electric motor company, powering next-generation platforms in aerospace, defense, and marine. Our integrated motor drives deliver 12+ kW/kg, roughly 3x the power density of competing solutions. We're now scaling to megawatt-class systems, with customers working on everything from supersonic aircraft to turbine power generation for AI datacenters.\n\nOur team brings together engineers and operators from aerospace, defense, and motorsports, with deep expertise in electric machines, power electronics, material science, and advanced manufacturing. We're a small, fast-moving team doing hard engineering that matters, and we're looking for people who want to do the best work of their careers alongside us.\n\n\n\nAbout the role\n\nOur team at H3X looking for a Sr. Procurement Specialist to execute day-to-day purchasing as we scale our manufacturing and introduce multiple new products. You will place and manage POs with approved suppliers, keep our supplier data current and reliable, and work on forecasting and supplier performance. This role is a great fit for someone who's detail-oriented, proactive by nature, and wants to grow into a broader supply chain or category management career as the function matures.\n\nYou are a strong fit if you've worked in procurement or buying for a complex, low/mid-volume manufacturer, you take ownership of accuracy and follow-through, and you like the idea of helping shape processes (forecasting models, category management, supplier KPIs) rather than just executing against them.\n\n\n\nWhat you will do:\n\nPurchasing Execution\n\n - Place POs with approved suppliers for needed parts, maintaining a proactive rather than reactive posture on lead times and material availability\n\n - Own the overall accuracy and reliability of PO data, quantities, pricing, dates, and terms\n\n - Track deliveries against POs and follow up with suppliers to keep orders on schedule\n\nSupplier Management\n\n - Maintain and continuously update the supplier database, including onboarding new suppliers\n\n - Ensure supplier certifications and NDAs are current and properly tracked\n\n - Assist in maintaining supplier relationships & partnerships\n\n - Actively participate in building out a Supplier KPI database to track and improve supplier performance\n\nPlanning & Forecasting\n\n - Develop forecasting models together for distribution to key suppliers\n\n - Support long-term planning efforts by keeping PO and supplier data organized and accessible\n\n - Flag supply risks\n\n - Coordinate with other team members across manufacturing engineering, production, and others\n\nCross-Functional Collaboration\n\n - Work with Leadership to support cash flow planning based on PO data and timing\n\n - Contribute to the development of category management as the supply chain function matures (e.g., Power Electronics, Electromagnetics, and other key commodity areas)\n\n - Partner with engineering, production, and inventory teams as needed to keep purchasing aligned with real-time needs\n\nReporting\n\n - Provide monthly reporting on purchasing activity, supplier performance, and open risks\n\n\n\nWhat we are looking for:\n\n - 5+ years of experience in buying, procurement, or purchasing, ideally in complex mechanical, electromechanical, or electronics manufacturing\n\n - Strong attention to detail and a track record of maintaining accurate, reliable purchasing data\n\n - Experience managing supplier relationships and tracking supplier documentation (certifications, NDAs, etc.)\n\n - Comfortable working with ERP/MRP systems for PO issuance and tracking\n\n - Strong communication skills and ability to work cross-functionally with finance, engineering, and operations\n\n - A proactive mindset, comfortable flagging risk early rather than waiting for it to become urgent\n\n\n\nPreferred Experience\n\n - Experience with Manufacturo or similar ERP/MRP platforms\n\n - Exposure to forecasting or demand planning processes\n\n - Familiarity with electronics or electromechanical component categories (e.g., power electronics, electromagnetics)\n\n\n\nCompensation & Benefits\n\n - Salary Compensation Range: $88,000 - $120,000\n\n\n\nWhy H3X\n\nJoining H3X means working on hard, meaningful problems with a skunkworks-style team that's laser-focused on building exceptional products. We're deeply vertically integrated and have a very tight design-build-test loop, which lets us move from concept to hardware at unmatched speed. We've gone from idea to shipping product in less than two months.\n\nWe're a small, highly skilled team where everyone carries real responsibility and shares an extreme ownership mentality. We stay focused on the critical path, keep bureaucracy to a minimum, and structure everything around delivering results. You'll learn and grow faster here than you would anywhere else.\n\nYou'll work alongside world-class engineers and builders who are pioneering electric motor technology at scale on some of the coolest programs in the industry, from supersonic aircraft to power generation for AI datacenters. If you want your contributions to be visible and your work to directly shape American reindustrialization, you'll feel at home here.\n\nOur team provides robust benefits including medical, vision, dental, disability, & life insurance offerings, employee equity incentive program, & 401k program. Additional benefits include our gym membership stipend and outdoor recreation reimbursement program. We have an execution based culture, with flexible hours, flexible time off, 12 company holidays (including our company ski trip), monthly company events, and weekly catered team lunch on Fridays.\n\n\n\nOur Values\n\nBe Relentless Never give up, persevere until the job is done. Run toward problems, not away from them. Grit is key.\n\nGain insight through humility Approach every challenge with a learner’s mindset. Stay open to feedback, listen to others, and deepen your understanding through self-awareness. Put your ego aside and seek the truth in every discussion, especially when leading others.\n\nDistill & Simplify Eliminate unjustified complexity and simplify wherever possible, whether in requirements, design, or execution. Use first principles thinking to distill every problem to its essence. Less is more.\n\nFind your flow Engage fully and work with intention. Find the rhythm and deep focus that lets you do your best work. Discover your Ikigai - where your strengths, passions, and purpose meet and drive your personal fulfillment and team success. That is when the magic happens.\n\nSEND (Solve, Evolve, Nail It, Deliver) Devise the best solution with the information at hand, test it, learn from it, and iterate quickly until you nail it. Nothing works perfectly the first time, but you should never hit the same issue twice. Stay laser-focused on solving customer problems and delivering solutions that create real value.\n\n\n\nEqual Opportunity Employer\n\nH3X is an equal opportunity-affirmative action employer and considers all qualified applicants for employment based on business needs, job requirements and individual qualifications, without regard to race, color, religion, sex, age, disability, sexual orientation, gender identity or expression, marital status, past or present military service or any other status protected by the laws or regulations in the locations where we operate.","compensation":{"compensationTierSummary":null,"scrapeableCompensationSalarySummary":null,"compensationTiers":[],"summaryComponents":[]}},{"id":"930b8250-4c6d-4df0-a326-892fd594759a","title":"Electromagnetics Engineering Intern (Spring)","department":"Engineering","team":"Engineering","employmentType":"FullTime","location":"Louisville, Colorado","shouldDisplayCompensationOnJobPostings":false,"secondaryLocations":[],"publishedAt":"2026-08-18T19:03:24.005+00:00","isListed":true,"isRemote":false,"workplaceType":"OnSite","address":{"postalAddress":{"addressRegion":"Colorado","addressCountry":"United States","addressLocality":"Louisville"}},"jobUrl":"https://jobs.ashbyhq.com/h3x-technologies/930b8250-4c6d-4df0-a326-892fd594759a","applyUrl":"https://jobs.ashbyhq.com/h3x-technologies/930b8250-4c6d-4df0-a326-892fd594759a/application","descriptionHtml":"About H3X Technologies
H3X is building America's advanced electric motor company, powering next-generation platforms in aerospace, defense, and marine. Our integrated motor drives deliver 12+ kW/kg, roughly 3x the power density of competing solutions. We're now scaling to megawatt-class systems, with customers working on everything from supersonic aircraft to turbine power generation for AI datacenters.
Our team brings together engineers and operators from aerospace, defense, and motorsports, with deep expertise in electric machines, power electronics, material science, and advanced manufacturing. We're a small, fast-moving team doing hard engineering that matters, and we're looking for people who want to do the best work of their careers alongside us.
About the role
Our team at H3X is hiring an intern to work alongside our design engineering team on real hardware programs. This is a hands-on role: you will contribute directly to electromagnetic design, analysis, and the tooling that supports our characterization and optimization workflows. You will see your work flow from simulation through to physical test data. We are looking for a full time Spring Intern, but also have availability for Summer 2027 and extended Co-Op positions.
What you will do:
Build and run finite element models to predict motor performance, including torque, losses, efficiency mapping, and thermal behavior
Perform electrical machine sizing and preliminary design trades to evaluate topology and geometry candidates against performance and packaging targets
Develop and maintain Python-based analysis and post-processing tooling for simulation exports and bench test data
Support multi-physics optimization studies spanning electromagnetic, thermal, and structural domains
Correlate simulation results against dynamometer and instrumentation data, and help close the loop between model and measurement
Document methods and results clearly so that the team can build on your work
What we are looking for:
Currently pursuing a BS, MS, or PhD in Electrical Engineering, Mechanical Engineering, or a related field
Coursework or project experience in electric machines and electromagnetics
Experience with FEA for electromagnetic analysis (JMAG strongly preferred; Ansys Maxwell, MotorCAD, or similar is acceptable)
Working knowledge of electrical machine sizing fundamentals, magnetic and electric loading, winding design, and the relationships between geometry and performance
Proficiency in Python for data analysis and automation
Exposure to multi-physics or design optimization methods (parametric sweeps, Pareto trade studies, coupled EM-thermal-structural analysis, multi-variable optimization algorithms)
Nice to have experience:
Familiarity with permanent magnet synchronous machines and traction-class motor design
Hands-on lab or test experience (dynamometer testing, power measurement, instrumentation)
Understanding of power electronics and three-phase systems
Familiarity with CAD tools (Solidworks preferred)
Familiarity with drawing creation & tolerancing
Compensation & Benefits
Salary/Hourly Compensation Range: $23 - $37/hr based on school level & experience
Flexible hours (deliverable-based goals)
Relocation package
Monthly company events
Friday Team Lunches
Why H3X
Joining H3X means working on hard, meaningful problems with a skunkworks-style team that's laser-focused on building exceptional products. We're deeply vertically integrated and have a very tight design-build-test loop, which lets us move from concept to hardware at unmatched speed. We've gone from idea to shipping product in less than two months.
We're a small, highly skilled team where everyone carries real responsibility and shares an extreme ownership mentality. We stay focused on the critical path, keep bureaucracy to a minimum, and structure everything around delivering results. You'll learn and grow faster here than you would anywhere else.
You'll work alongside world-class engineers and builders who are pioneering electric motor technology at scale on some of the coolest programs in the industry, from supersonic aircraft to power generation for AI datacenters. If you want your contributions to be visible and your work to directly shape American reindustrialization, you'll feel at home here.
Our Values
Be Relentless Never give up, persevere until the job is done. Run toward problems, not away from them. Grit is key.
Gain insight through humility Approach every challenge with a learner’s mindset. Stay open to feedback, listen to others, and deepen your understanding through self-awareness. Put your ego aside and seek the truth in every discussion, especially when leading others.
Distill & Simplify Eliminate unjustified complexity and simplify wherever possible, whether in requirements, design, or execution. Use first principles thinking to distill every problem to its essence. Less is more.
Find your flow Engage fully and work with intention. Find the rhythm and deep focus that lets you do your best work. Discover your Ikigai - where your strengths, passions, and purpose meet and drive your personal fulfillment and team success. That is when the magic happens.
SEND (Solve, Evolve, Nail It, Deliver) Devise the best solution with the information at hand, test it, learn from it, and iterate quickly until you nail it. Nothing works perfectly the first time, but you should never hit the same issue twice. Stay laser-focused on solving customer problems and delivering solutions that create real value.
Equal Opportunity Employer
H3X is an equal opportunity-affirmative action employer and considers all qualified applicants for employment based on business needs, job requirements and individual qualifications, without regard to race, color, religion, sex, age, disability, sexual orientation, gender identity or expression, marital status, past or present military service or any other status protected by the laws or regulations in the locations where we operate.
","descriptionPlain":"About H3X Technologies\n\nH3X is building America's advanced electric motor company, powering next-generation platforms in aerospace, defense, and marine. Our integrated motor drives deliver 12+ kW/kg, roughly 3x the power density of competing solutions. We're now scaling to megawatt-class systems, with customers working on everything from supersonic aircraft to turbine power generation for AI datacenters.\n\nOur team brings together engineers and operators from aerospace, defense, and motorsports, with deep expertise in electric machines, power electronics, material science, and advanced manufacturing. We're a small, fast-moving team doing hard engineering that matters, and we're looking for people who want to do the best work of their careers alongside us.\n\n\n\nAbout the role\n\nOur team at H3X is hiring an intern to work alongside our design engineering team on real hardware programs. This is a hands-on role: you will contribute directly to electromagnetic design, analysis, and the tooling that supports our characterization and optimization workflows. You will see your work flow from simulation through to physical test data. We are looking for a full time Spring Intern, but also have availability for Summer 2027 and extended Co-Op positions.\n\n\n\nWhat you will do:\n\n - Build and run finite element models to predict motor performance, including torque, losses, efficiency mapping, and thermal behavior\n\n - Perform electrical machine sizing and preliminary design trades to evaluate topology and geometry candidates against performance and packaging targets\n\n - Develop and maintain Python-based analysis and post-processing tooling for simulation exports and bench test data\n\n - Support multi-physics optimization studies spanning electromagnetic, thermal, and structural domains\n\n - Correlate simulation results against dynamometer and instrumentation data, and help close the loop between model and measurement\n\n - Document methods and results clearly so that the team can build on your work\n \n \n\nWhat we are looking for:\n\n - Currently pursuing a BS, MS, or PhD in Electrical Engineering, Mechanical Engineering, or a related field\n\n - Coursework or project experience in electric machines and electromagnetics\n\n - Experience with FEA for electromagnetic analysis (JMAG strongly preferred; Ansys Maxwell, MotorCAD, or similar is acceptable)\n\n - Working knowledge of electrical machine sizing fundamentals, magnetic and electric loading, winding design, and the relationships between geometry and performance\n\n - Proficiency in Python for data analysis and automation\n\n - Exposure to multi-physics or design optimization methods (parametric sweeps, Pareto trade studies, coupled EM-thermal-structural analysis, multi-variable optimization algorithms)\n\n\n\nNice to have experience:\n\n - Familiarity with permanent magnet synchronous machines and traction-class motor design\n\n - Hands-on lab or test experience (dynamometer testing, power measurement, instrumentation)\n\n - Understanding of power electronics and three-phase systems\n\n - Familiarity with CAD tools (Solidworks preferred)\n\n - Familiarity with drawing creation & tolerancing\n\n\n\nCompensation & Benefits\n\n - Salary/Hourly Compensation Range: $23 - $37/hr based on school level & experience\n\n - Flexible hours (deliverable-based goals)\n\n - Relocation package\n\n - Monthly company events\n\n - Friday Team Lunches\n \n \n\nWhy H3X\n\nJoining H3X means working on hard, meaningful problems with a skunkworks-style team that's laser-focused on building exceptional products. We're deeply vertically integrated and have a very tight design-build-test loop, which lets us move from concept to hardware at unmatched speed. We've gone from idea to shipping product in less than two months.\n\nWe're a small, highly skilled team where everyone carries real responsibility and shares an extreme ownership mentality. We stay focused on the critical path, keep bureaucracy to a minimum, and structure everything around delivering results. You'll learn and grow faster here than you would anywhere else.\n\nYou'll work alongside world-class engineers and builders who are pioneering electric motor technology at scale on some of the coolest programs in the industry, from supersonic aircraft to power generation for AI datacenters. If you want your contributions to be visible and your work to directly shape American reindustrialization, you'll feel at home here.\n\n\n\nOur Values\n\nBe Relentless Never give up, persevere until the job is done. Run toward problems, not away from them. Grit is key.\n\nGain insight through humility Approach every challenge with a learner’s mindset. Stay open to feedback, listen to others, and deepen your understanding through self-awareness. Put your ego aside and seek the truth in every discussion, especially when leading others.\n\nDistill & Simplify Eliminate unjustified complexity and simplify wherever possible, whether in requirements, design, or execution. Use first principles thinking to distill every problem to its essence. Less is more.\n\nFind your flow Engage fully and work with intention. Find the rhythm and deep focus that lets you do your best work. Discover your Ikigai - where your strengths, passions, and purpose meet and drive your personal fulfillment and team success. That is when the magic happens.\n\nSEND (Solve, Evolve, Nail It, Deliver) Devise the best solution with the information at hand, test it, learn from it, and iterate quickly until you nail it. Nothing works perfectly the first time, but you should never hit the same issue twice. Stay laser-focused on solving customer problems and delivering solutions that create real value.\n\n\n\nEqual Opportunity Employer\n\nH3X is an equal opportunity-affirmative action employer and considers all qualified applicants for employment based on business needs, job requirements and individual qualifications, without regard to race, color, religion, sex, age, disability, sexual orientation, gender identity or expression, marital status, past or present military service or any other status protected by the laws or regulations in the locations where we operate.","compensation":{"compensationTierSummary":null,"scrapeableCompensationSalarySummary":null,"compensationTiers":[],"summaryComponents":[]}},{"id":"be8855c5-f8c7-4f09-bd3f-04ecbcf4b42d","title":"Test Engineering Intern (Spring)","department":"Engineering","team":"Engineering","employmentType":"FullTime","location":"Louisville, Colorado","shouldDisplayCompensationOnJobPostings":false,"secondaryLocations":[],"publishedAt":"2026-08-18T18:51:36.580+00:00","isListed":true,"isRemote":false,"workplaceType":"OnSite","address":{"postalAddress":{"addressRegion":"Colorado","addressCountry":"United States","addressLocality":"Louisville"}},"jobUrl":"https://jobs.ashbyhq.com/h3x-technologies/be8855c5-f8c7-4f09-bd3f-04ecbcf4b42d","applyUrl":"https://jobs.ashbyhq.com/h3x-technologies/be8855c5-f8c7-4f09-bd3f-04ecbcf4b42d/application","descriptionHtml":"About H3X Technologies
H3X is building America's advanced electric motor company, powering next-generation platforms in aerospace, defense, and marine. Our integrated motor drives deliver 12+ kW/kg, roughly 3x the power density of competing solutions. We're now scaling to megawatt-class systems, with customers working on everything from supersonic aircraft to turbine power generation for AI datacenters.
Our team brings together engineers and operators from aerospace, defense, and motorsports, with deep expertise in electric machines, power electronics, material science, and advanced manufacturing. We're a small, fast-moving team doing hard engineering that matters, and we're looking for people who want to do the best work of their careers alongside us.
About the role
H3X is looking to hire a test engineering intern this to support R&D and production testing across the HPDM product line. This is not an ordinary internship. You will be given the full responsibility of a test engineer. The engineering team is intentionally small and operates at a very fast pace. A high degree of self-motivation and responsibility is required as you will be given significant freedom and will be directly responsible for your parts. We are looking for a full time Spring Intern, but also have availability for Summer 2027 and extended Co-Op positions.
What you will do:
Requirements/Concept
Establish and document requirements to fulfill testing equipment design needs
Conceptualize test equipment designs
Gather and consolidate requirements for R&D test suites in the form of test plans
Design and Analysis
Design parts and assemblies utilizing SolidWorks
Prototype and Manufacturing
Compile complete Bills of Materials
Provide technical supply chain support for sourcing hardware
Work with technicians and test engineers to build initial prototypes
Test prototype equipment for verification
Testing and Validation
Create a test plan and checklist to validate product design targets
Support testing execution and characterization of new designs
Interpret test results, identify root-cause of issues, and make design recommendations to meet the highest level of reliability and performance
Integration
Support complete system tests
Other
Identify workplace hazards and implement safe processes
Maintain testing and production equipment where necessary
What we are looking for:
Pursuing a Bachelor’s or Graduate Degree in Mechanical Engineering or similar
GPA of 3.0 or higher
Hands-on experience assembling mechanical systems
Hands-on experience with product testing
SolidWorks proficient (or similar)
Excellent written and verbal communication
Exceptional understanding of fundamentals
Action biased, results-driven mentality
Willingness to learn quickly
Nice to Have Experience:
Experience with dynamometer testing
Experience with electric motors and/or inverter drives
Experience with data processing
Compensation & Benefits
Salary/Hourly Compensation Range: $23 - $37/hr based on school level & experience
Flexible hours (deliverable-based goals)
Relocation package
Monthly company events
Friday Team Lunches
Why H3X
Joining H3X means working on hard, meaningful problems with a skunkworks-style team that's laser-focused on building exceptional products. We're deeply vertically integrated and have a very tight design-build-test loop, which lets us move from concept to hardware at unmatched speed. We've gone from idea to shipping product in less than two months.
We're a small, highly skilled team where everyone carries real responsibility and shares an extreme ownership mentality. We stay focused on the critical path, keep bureaucracy to a minimum, and structure everything around delivering results. You'll learn and grow faster here than you would anywhere else.
You'll work alongside world-class engineers and builders who are pioneering electric motor technology at scale on some of the coolest programs in the industry, from supersonic aircraft to power generation for AI datacenters. If you want your contributions to be visible and your work to directly shape American reindustrialization, you'll feel at home here.
Our Values
Be Relentless Never give up, persevere until the job is done. Run toward problems, not away from them. Grit is key.
Gain insight through humility Approach every challenge with a learner’s mindset. Stay open to feedback, listen to others, and deepen your understanding through self-awareness. Put your ego aside and seek the truth in every discussion, especially when leading others.
Distill & Simplify Eliminate unjustified complexity and simplify wherever possible, whether in requirements, design, or execution. Use first principles thinking to distill every problem to its essence. Less is more.
Find your flow Engage fully and work with intention. Find the rhythm and deep focus that lets you do your best work. Discover your Ikigai - where your strengths, passions, and purpose meet and drive your personal fulfillment and team success. That is when the magic happens.
SEND (Solve, Evolve, Nail It, Deliver) Devise the best solution with the information at hand, test it, learn from it, and iterate quickly until you nail it. Nothing works perfectly the first time, but you should never hit the same issue twice. Stay laser-focused on solving customer problems and delivering solutions that create real value.
Equal Opportunity Employer
H3X is an equal opportunity-affirmative action employer and considers all qualified applicants for employment based on business needs, job requirements and individual qualifications, without regard to race, color, religion, sex, age, disability, sexual orientation, gender identity or expression, marital status, past or present military service or any other status protected by the laws or regulations in the locations where we operate.
","descriptionPlain":"About H3X Technologies\n\nH3X is building America's advanced electric motor company, powering next-generation platforms in aerospace, defense, and marine. Our integrated motor drives deliver 12+ kW/kg, roughly 3x the power density of competing solutions. We're now scaling to megawatt-class systems, with customers working on everything from supersonic aircraft to turbine power generation for AI datacenters.\n\nOur team brings together engineers and operators from aerospace, defense, and motorsports, with deep expertise in electric machines, power electronics, material science, and advanced manufacturing. We're a small, fast-moving team doing hard engineering that matters, and we're looking for people who want to do the best work of their careers alongside us.\n\n\n\nAbout the role\n\nH3X is looking to hire a test engineering intern this to support R&D and production testing across the HPDM product line. This is not an ordinary internship. You will be given the full responsibility of a test engineer. The engineering team is intentionally small and operates at a very fast pace. A high degree of self-motivation and responsibility is required as you will be given significant freedom and will be directly responsible for your parts. We are looking for a full time Spring Intern, but also have availability for Summer 2027 and extended Co-Op positions.\n\n\n\nWhat you will do:\n\n - Requirements/Concept\n \n - Establish and document requirements to fulfill testing equipment design needs\n \n - Conceptualize test equipment designs\n \n - Gather and consolidate requirements for R&D test suites in the form of test plans\n\n - Design and Analysis\n \n - Design parts and assemblies utilizing SolidWorks\n\n - Prototype and Manufacturing\n \n - Compile complete Bills of Materials\n \n - Provide technical supply chain support for sourcing hardware\n \n - Work with technicians and test engineers to build initial prototypes\n \n - Test prototype equipment for verification\n\n - Testing and Validation\n \n - Create a test plan and checklist to validate product design targets\n \n - Support testing execution and characterization of new designs\n \n - Interpret test results, identify root-cause of issues, and make design recommendations to meet the highest level of reliability and performance\n\n - Integration\n \n - Support complete system tests\n\n - Other\n \n - Identify workplace hazards and implement safe processes\n \n - Maintain testing and production equipment where necessary\n\n\n\nWhat we are looking for:\n\n - Pursuing a Bachelor’s or Graduate Degree in Mechanical Engineering or similar\n\n - GPA of 3.0 or higher\n\n - Hands-on experience assembling mechanical systems\n\n - Hands-on experience with product testing\n\n - SolidWorks proficient (or similar)\n\n - Excellent written and verbal communication\n\n - Exceptional understanding of fundamentals\n\n - Action biased, results-driven mentality\n\n - Willingness to learn quickly\n\n\n\nNice to Have Experience:\n\n - Experience with dynamometer testing\n\n - Experience with electric motors and/or inverter drives\n\n - Experience with data processing\n\n\n\nCompensation & Benefits\n\n - Salary/Hourly Compensation Range: $23 - $37/hr based on school level & experience\n\n - Flexible hours (deliverable-based goals)\n\n - Relocation package\n\n - Monthly company events\n\n - Friday Team Lunches\n\n\n\nWhy H3X\n\nJoining H3X means working on hard, meaningful problems with a skunkworks-style team that's laser-focused on building exceptional products. We're deeply vertically integrated and have a very tight design-build-test loop, which lets us move from concept to hardware at unmatched speed. We've gone from idea to shipping product in less than two months.\n\nWe're a small, highly skilled team where everyone carries real responsibility and shares an extreme ownership mentality. We stay focused on the critical path, keep bureaucracy to a minimum, and structure everything around delivering results. You'll learn and grow faster here than you would anywhere else.\n\nYou'll work alongside world-class engineers and builders who are pioneering electric motor technology at scale on some of the coolest programs in the industry, from supersonic aircraft to power generation for AI datacenters. If you want your contributions to be visible and your work to directly shape American reindustrialization, you'll feel at home here.\n\n\n\nOur Values\n\nBe Relentless Never give up, persevere until the job is done. Run toward problems, not away from them. Grit is key.\n\nGain insight through humility Approach every challenge with a learner’s mindset. Stay open to feedback, listen to others, and deepen your understanding through self-awareness. Put your ego aside and seek the truth in every discussion, especially when leading others.\n\nDistill & Simplify Eliminate unjustified complexity and simplify wherever possible, whether in requirements, design, or execution. Use first principles thinking to distill every problem to its essence. Less is more.\n\nFind your flow Engage fully and work with intention. Find the rhythm and deep focus that lets you do your best work. Discover your Ikigai - where your strengths, passions, and purpose meet and drive your personal fulfillment and team success. That is when the magic happens.\n\nSEND (Solve, Evolve, Nail It, Deliver) Devise the best solution with the information at hand, test it, learn from it, and iterate quickly until you nail it. Nothing works perfectly the first time, but you should never hit the same issue twice. Stay laser-focused on solving customer problems and delivering solutions that create real value.\n\n\n\nEqual Opportunity Employer\n\nH3X is an equal opportunity-affirmative action employer and considers all qualified applicants for employment based on business needs, job requirements and individual qualifications, without regard to race, color, religion, sex, age, disability, sexual orientation, gender identity or expression, marital status, past or present military service or any other status protected by the laws or regulations in the locations where we operate.","compensation":{"compensationTierSummary":null,"scrapeableCompensationSalarySummary":null,"compensationTiers":[],"summaryComponents":[]}}],"apiVersion":"1"}