Senior Multiphysics Modeler

Senior Multiphysics Modeler Location: Devens, MA. R&D – Materials. Full‑time, on‑site. About Commonwealth Fusion Systems Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy. Combining decades of research, top talent, and new technologies, we’re designing and building commercially viable fusion power plants. We work with policymakers and suppliers to build the energy industry of the future. Since 2018, we’ve raised nearly $3 billion in capital, making us the largest and leading private fusion company in the world. What You’ll Do Lead the development of an integrated power plant fuel cycle model Develop models for unit operations and incorporate multi‑effects in components Develop simulation tools to enable targeted R&D for key fuel cycle technologies Own the fuel cycle simulation tools and models Validate models and identify key R&D requirements to enable validation where there are currently gaps in the literature Collaborate cross‑functionally with both internal and external experts to ensure fuel cycle models are feasible, economic and state‑of‑the‑art Develop processes and layouts for fueling subsystem blocks that are communicated through standard engineering documents Generate detailed work plans and define milestones, integrated with R&D, to deliver validated models Provide guidance to colleagues for use of developed modeling tools and outputs Identify emerging trends and opportunities and influence CFSs’s fuel cycle modeling strategy What We’re Looking For Master’s degree or similar experience with 7+ years in chemical engineering, mechanical engineering, physics, materials science, physical chemistry or similar fields 5+ years experience modeling process systems 5+ years experience in computer programming Knowledge of transport phenomena and chemical processes in gases Experience building integrated process models Experience in process engineering and systems integration Experience managing large data sets Understanding of scalable simulations Track record in version control Data reduction and results analysis Bonus Points For Experience with Python and/or Matlab Experience with multiphysics tools such as Comsol Exposure to process simulators like HYSYS Use of engineering management tools Confluence/JIRA and remote collaboration tools Fusion energy experience Chemical engineering expertise Atom and molecular mass transport knowledge Must‑have Requirements Ability to occasionally lift up to 50 lbs Perform activities such as sitting, typing, standing, stooping, or climbing for extended periods of time Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics Willingness to travel or work required nights, weekends, or on‑call occasionally Compensation & Benefits $110,000 – $185,000 a year. Salary range for this full‑time position with equity and benefits. The actual salary will depend on level, location, qualifications, and experience. The range displayed on each job posting reflects new hire salaries for the position across all U.S. locations. Competitive compensation with equity 13 company‑wide holidays Flexible vacation days 10 sick days Generous parental leave policy Health, dental, and vision insurance 401(k) with employer matching Professional growth opportunities Team‑building activities Export Control Compliance This role requires compliance with U.S. laws concerning the export of controlled or protected technologies or information (collectively, “Export Control Laws”). Any offer of employment will be contingent on the need for compliance with such Export Control Laws. Equal Opportunity Statement We value diversity deeply and are proud to be an equal‑opportunity employer by choice. We consider all qualified applicants equally, regardless of race, color, national origin, ancestry, citizenship status, protected veteran status, religion, physical or mental disability, marital status, sex, sexual orientation, gender identity or expression, age, or any other basis protected by law. #J-18808-Ljbffr Gigascale Capital