Commonwealth Fusion Systems · 1 month ago
Senior Multiphysics Modeler
Devens, MA
Full-time
Onsite
Senior Level
$110K/yr - $185K/yr
7+ years expCommonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy. The Senior Multiphysics Modeler will work closely with the CFS tritium program and process engineering team to develop a fuel cycle model for the world's first fusion power plant, focusing on simulation toolkits and workflows that integrate multiphysics simulations with industrial process models.
Clean EnergyElectrical DistributionEnergyEnvironmental EngineeringRenewable Energy
Responsibilities
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
Qualification
Required
Degree in a relevant engineering or science discipline
Experience in process modeling and programming
Demonstrated ability to apply a first principles approach in solving complex engineering problems
Experience conducting cost-benefit analysis to evaluate the economics of proposed solutions
Demonstrated success working on engineering projects in multi-disciplinary teams generating effective solutions to complex problems
Master's degree or similar experience with 7+ years in chemical engineering, mechanical engineering, physics, materials science, physical chemistry or similar
5+ years experience modeling process systems
5+ years experience in computer programming
Knowledge of transport phenomena and chemical processes in gasses
Experience building integrated process models
Process engineering and systems integration
Experience managing large data sets
Understanding of scalable simulations
Track record in version control
Data reduction and results analysis
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/on-call occasionally
Preferred
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
Atom and molecular mass transport
Benefits
Competitive compensation with equity
12.5 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
Company
Commonwealth Fusion Systems
Commonwealth Fusion Systems designs and develops commercial fusion energy systems to produce clean energy.
501-1000 employees
Funding
Current Stage
Late StageTotal Funding
$2.88BKey Investors
GoogleUS Department of EnergyTiger Global Management
2025-08-27Series B· $863M
2025-06-30Corporate Round
2024-06-06Grant· $15M
Leadership Team
Robert Mumgaard
Chief Executive Officer and Co-Founder
Martin Greenwald
Cofounder
Recent News
Crowdfund Insider
2026-01-22
2026-01-13
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