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Louisville, Kentucky, United States
Onsite
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.