Commonwealth Fusion Systems
Staff Multiphysics Modeler
$152K–$230K
Devens, MA · On-site · Staff · Full-time · Posted Jul 16, 2026
- Experience
- 10+ years in a relevant discipline; 10+ years modeling process systems; 10+ years in computer programming.
- Education
- Master’s degree or similar experience.
- Visa sponsorship
- The role requires compliance with U.S. Export Control Laws; any employment offer is contingent on that compliance.
About the job
Develops and owns integrated fuel-cycle models and simulation tools for CFS’s planned ARC fusion power plant, supporting technology development, subsystem integration, and validation.
What you'll do
- Lead development of an integrated power plant fuel-cycle model, including models for unit operations and component effects.
- Develop, validate, and maintain simulation tools and models; identify research needs where validation gaps exist.
- Work with internal and external teams to assess feasibility and economics, plan engineering work, and guide colleagues in using modeling tools.
What they ask for
- Master’s degree or similar experience in a relevant field, with 10+ years in chemical engineering, mechanical engineering, physics, materials science, physical chemistry, or similar.
- 10+ years of experience modeling process systems and 10+ years of experience in computer programming.
- Expertise in transport phenomena and chemical processes in gases, including demonstrated experience building integrated process models.
- Experience with first-principles engineering problem-solving, cost-benefit analysis, multidisciplinary engineering projects, and version control.
Nice to have
- Experience with Python and/or Matlab, multiphysics tools such as Comsol, or process simulators like HYSYS.
- Fusion energy experience; exposure to engineering management, Confluence/JIRA, or remote collaboration tools.
Pay
USD 152,000–230,000 per-year-salary; base salary
Tools
Python, Matlab, Comsol, HYSYS, Confluence, JIRA
Model-written summary · the original posting is authoritative