Mechanical Engineering Internship, Xcimer
Spring Semester 2026
$25 - $35 an hour
More information about location
Developing carbon-free fusion energy
Be an early applicant
Developing carbon-free fusion energy
101-200 employees
Be an early applicant
$25 - $35 an hour
More information about location
101-200 employees
Company mission
To free humanity from fossil fuels, save the planet from climate change and unlock a new era of progress, prosperity and safety for all.
Role
Who you are
- We are seeking interns who are passionate about applying their technical skills, problem-solving abilities, and commitment to quality to drive the future of clean energy!
- Qualified candidates must be enrolled in a Bachelor's, Master’s or PhD degree program from an accredited college or university in mechanical engineering, electrical engineer, physics, nuclear engineering, or other related engineering discipline
- Application of technical skills outside of the classroom (examples include: extracurricular projects, volunteering, personal projects, laboratory research, or prior internship/work experience)
- Proficiency in CAD software for 3D modeling and simulation
- Strong written, verbal, communication, and interpersonal skills
- Passion for fusion energy!
- Ability to work full-time onsite through the duration of the 12 week internship program in Denver, CO
- Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum
What the job involves
- Join Xcimer’s engineering internship program and gain hands-on experience in designing and building cutting-edge laser-driven inertial fusion hardware and software
- As an intern, you will be integral to developing the systems needed for the world’s first commercial fusion energy power plant
- We have multiple internship opportunities available across various disciplines, including Mechanical Engineering, Electrical Engineering, Physics, and Software Development. Please apply to the posting that best matches your background and interests
- During this 12-week program at our headquarters in Denver, CO, you’ll work alongside an industry expert mentor to tackle complex, real-world challenges in fields such as structures, mechanisms, optics, pulsed power, computational engineering, plasma physics, and manufacturing
- Mechanical design and hardware development
- Mechanical and thermal analysis using finite element analysis
- Systems engineering
- Manufacturing engineering
- Electrical engineering (pulsed power)
- Control systems engineering
- Computational and software engineering (simulations)
- Nuclear engineering
- Optical engineering
- Plasma physics
Application process
- Application close date: 10/01/2025
Our take
The need for safe, reliable, and zero-carbon energy is urgent. Fossil fuels cause significant emissions and environmental harm, while renewables like wind and solar are limited by their intermittent nature. This has intensified the search for sustainable solutions, with nuclear fusion standing out.
Xcimer is advancing laser-driven inertial fusion technology to address this energy problem. Leveraging decades of research and advancements in technology, the company hopes to enhance the efficiency and scalability of fusion energy production.
In a nutshell, the company is developing the world's highest-energy laser system, using innovative techniques to scale fusion generation to industrial levels. This approach has the potential to make fusion a viable and economical energy source - having a significant effect on global energy woes.
With a successful round of fundraising in 2024, Xcimer is set to advance its technological and commercialisation efforts. It plans to establish a new facility in Denver for constructing a prototype laser system, and expand its technical team. A $9 million award from the US Department of Energy further highlights the value of bringing the promise of fusion power closer to reality.
Steph
Company Specialist at Welcome to the Jungle
Company
Company benefits
- Medical, Dental, Vision
- Basic and supplemental life insurance
- Paid parental leave
- Short and long-term disability
- 401(k) with company match of up to 6%
- Paid Time Off: 15 days per year based on weekly scheduled hours
- 10 paid sick leave
- 13 company-paid holidays
- Equity for eligible employees
Company HQ
Central Park, Denver, CO
Leadership
Conner Galloway
(Co-Founder & CEO)Previously a Technical Lead at AliveCor. Also served as a Chief Scientist at IE Energy Partners.
Alexander Valys
(Co-Founder & CTO)Previously a Staff Engineer at Meta. Prior to that, they were Director of Engineering at AliveCor and the Vice President of IE Energy Partners.
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