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Salary
$120k – $160k per year
Location
In office (Denver)
Seniority
Junior · 2+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 25, 2026. First seen by Alion on Apr 29, 2026. Xcimer Energy scores A on the Alion truth index.

Overview
Company
Impact
Profile match
Xcimer Energy is a Denver-based company developing laser-driven inertial fusion power and high-energy laser systems for air defense, built around large electron-beam-pumped excimer lasers. In 2024 it began building Phoenix, its first high-energy laser system, in its Denver laser bay, it has had a fusion power plant preconceptual design milestone approved by the US Department of Energy, and RTX has invested in it to develop directed energy technology. It hires optical, laser, pulsed power and nuclear engineers, physicists and materials scientists, scientific software and data engineers, technicians, quality and supply chain leaders, and summer interns.

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

This is a full-time, onsite role based at our headquarters in Denver, CO.

As a Pulsed Power Simulation & Modeling Engineer, you will apply your skills to creating models of, and simulating cutting-edge pulsed power electrical and mechanical systems. This role encompasses the use of multi-physics and electromagnetics solvers to aid in the design and optimization of associated systems and components. We are looking for our Pulsed Power Simulation & Modeling Engineer to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

  • Work with pulsed power design engineers to generate models of systems and components
  • Work with a multidisciplinary team to create, optimize and validate models of complex physical processes and phenomena.
  • Aid in the design of experiments for validation of models against real-world data
  • Work with design engineers to enhance the workflow from concept to final print based upon optimizations in simulation.

Qualifications

  • Education: B.S. or M.S.in Mechanical or Electrical Engineering
  • Experience: 2+ years of experience with field solver/particle-in-cell/circuit simulation codes
  • Strong communication skills across disciplines and departments
  • 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

Desired

  • Proficiency in COMSOL, CST and/or LT-SPICE
  • Proficiency in solid-modeling software, e.g. SolidWorks or NX
  • Strong knowledge of electromagnetic field principles
  • Mechanical design skills - knowledge of GD&T principles a plus
  • Proficiency with Python and/or MATLAB. Experience with VBA and Java a plus
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