Cryophysicist
US$140,000 – US$165,000 / yr base salary
Posted 29 Sep 2026
BranchFactor Summary
The original posting with the fluff stripped out
- Expected experience
- 0–3 yrs
- Management level
- Individual contributor
- Employment
- On-Site
- Contract
- Full-time
| Base salary | US$140,000 – US$165,000 / yr |
|---|
Field of studyAerospace Engineering, Applied Physics, Engineering Physics, Mechanical Engineering, Vacuum Engineering (or related)
Study levelMaster's or higher
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. We are welcoming applicants for a Cryophysicist position on Xcimer’s Fill and Injection Station Team. The successful candidate will join a growing group of engineers and scientists aimed at developing the processes and technologies to build a first of its kind Inertial Fusion Energy fueling station for Xcimer’s fusion reactor plant. In this role, you will lead the experimental and theoretical design, characterization, and optimization of physical systems operating at ultra-low temperatures. You will manage relations and work closely with collaborators from national labs and universities to drive research objectives that will critically impact future system design and architecture. This is an entry- to mid-level role focused on experimental and theoretical R&D.
Responsibilities
Experimental Research
- Design, build, and iterate on experiments aimed at advancing target filling processes and technologies.
- Evaluate, analyze, and improve system designs aimed at streamlining rapid target throughput.
- Own the documentation and management of internal test stands and their experiments.
- Partner with a varied team of scientists, engineers, and designers to translate experience into realizable products.
Modeling and Simulation
- Advance the team’s predictive capabilities utilizing COMSOL Multiphysics to model physical systems.
- Leverage Python to develop in-house simulations for thermal transport, fluid flow, and materials interactions.
- Provide insight into results from collaborators and internal experiments using analysis and modeling methods.
- Own documentation and artifacts for developed models and simulations.
Work Share Rotation
- Split your time between the Xcimer Fill and Injection Station team and our external collaborators.
- Serve as the primary contact for the knowledge transfer between our collaborators and Xcimer.
- Balance the role of being both mentor and mentee to both teams.