Spring 2026

Electrical and Pulsed Power Engineering Intern

Electrical and Pulsed Power Engineering

Posted on 9/1/2025

Xcimer Energy

Xcimer Energy

51-200 employees

Develops inertial fusion power using laser

Compensation Overview

$25 - $35/hr

Denver, CO, USA

In Person

Category
Electrical Engineering (2)
,
Required Skills
CAD
Requirements
  • 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 engineering, 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.
Responsibilities
  • 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

Xcimer Energy develops inertial fusion energy technology aiming to generate fusion-powered electricity. Its system uses a 10+ megajoule KrF laser to ignite a hydrogen fusion target inside a HYLIFE-style liquid-wall chamber, which absorbs fusion energy and shields reactor walls for long life. The approach combines a high-energy laser, a consumable fusion target, and a liquid-wall chamber to pursue scalable, laser-driven inertial confinement fusion for power generation. The company’s goal is to make commercial fusion power a reality for utilities within the next decade.

Company Size

51-200

Company Stage

Series A

Total Funding

$117.8M

Headquarters

Denver, Colorado

Founded

2021

Simplify Jobs

Simplify's Take

What believers are saying

  • Phoenix demo validates laser architecture in Denver by 2026 using DOE-funded LPK.
  • $100M Series A from Hedosophia funds Vulcan breakeven by 2031 and Athena grid power.
  • AI data centers demand 400 MW firm power, aligning with Athena's mid-2030s deployment.

What critics are saying

  • NIF's irreproducible ignition since 2022 invalidates Xcimer's scaling to Vulcan by 2031.
  • Commonwealth Fusion Systems' SPARC achieves net energy in 2027, preempting Xcimer's advantage.
  • Excimer supply from Trumpf and Coherent halts by 2028 due to export controls.

What makes Xcimer Energy unique

  • Xcimer uses excimer lasers with 30x lower cost per joule than NIF's 192-beam system.
  • Xcimer employs HYLIFE-III molten salt chamber for 40-year lifetime and tritium breeding.
  • Xcimer builds on NIF's proven ignition unlike unproven magnetic confinement approaches.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

Life Insurance

Disability Insurance

401(k) Company Match

Paid Vacation

Paid Sick Leave

Paid Holidays

Company Equity

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

6%

2 year growth

16%
Business Wire
Jun 6th, 2024
Xcimer Raises $100 Million to Put Inertial Fusion Energy on Path to Commercialization

Xcimer Energy Inc. today announced that it has raised $100 million in Series A financing led by Hedosophia, with participation from investors includin

Yahoo Finance
Jun 5th, 2024
Xcimer Raises $100 Million to Put Inertial Fusion Energy on Path to Commercialization

DENVER, June 04, 2024--Xcimer Energy Inc. today announced that it has raised $100 million in Series A financing led by Hedosophia, with participation from investors including Breakthrough Energy Ventures, Lowercarbon Capital, Prelude Ventures, Emerson Collective, Gigascale Capital and Starlight Ventures. Xcimer will use this financing to establish a new facility in Denver, where it will build a prototype laser system including the world’s largest nonlinear optical pulse compression system to adv

Business Wire
Jun 2nd, 2023
Xcimer Energy Announces $9 Million US Department of Energy Award to Develop Laser-Driven Inertial Fusion Energy

The US Department of Energy announced Xcimer has been selected for $9M of federal funding for development of laser inertial fusion energy.

INACTIVE