> Markdown version of [/jobs/ext/2712660-staff-multiphysics-modeler](https://www.wearedevelopers.com/jobs/ext/2712660-staff-multiphysics-modeler). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Staff Multiphysics Modeler - **Company:** The Commonwealth - **Location:** United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Confluence, JIRA, Big Data, Computer Programming, Comsol Multiphysics, Data Reduction, Python (Programming Language), MATLAB, Software Requirements Analysis, Model Validation, Software Version Control - **Published:** September 4, 2026 - **Apply:** https://startup.jobs/staff-multiphysics-modeler-commonwealth-fusion-systems-8767578 ## About the Role Applicants must have a degree in a relevant engineering or science discipline as well as experience in process modeling and programming. Applicants must have a demonstrated ability to apply a first principles approach in solving complex engineering problems and experience conducting cost-benefit to evaluate the economics of proposed solutions. Applicants must have demonstrated success working on engineering projects in multi-disciplinary teams generating effective solutions to complex problems., * Master's degree or similar experience with 10+ years in chemical engineering, mechanical engineering, physics, materials science, physical chemistry or similar * 10+ years experience modeling process systems * 10+ years experience in computer programming * Expertise with transport phenomena and chemical processes in gasses including demonstrated experience building integrated process models * Proven experience as an "expert" to evangelizing solutions and working across teams for shared solutions * Experience building and 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 Atom and molecular mass transport 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 ## Description The Staff 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, ARC, located in Chesterfield County, Virginia. The Staff Multiphysics Modeler will develop simulation toolkits and workflows that integrate first-principles multiphysics simulations with industrial process models to support technology development and subsystem integration for key fuel cycle systems, supported by the CFS fuel team to understand system requirements. The ideal candidate is an expert in heat and mass transport modeling, with an appreciation for simplicity and drive to build. This individual knows the power of optimizing devices by tuning material parameters, and appreciates a simple non-dimensional analysis and rigorous integrated simulations as the problem space requires. The candidate enjoys teaching and building tools that others can use independently., * 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 ## Related Videos - [Strange New Worlds: shaping the future of the digital age](https://www.wearedevelopers.com/videos/677-strange-new-worlds-shaping-the-future-of-the-digital-age) - [Alibaba Big Data and Machine Learning Technology](https://www.wearedevelopers.com/videos/37-alibaba-big-data-and-machine-learning-technology) - [Leveraging Large Language Models for Legacy Code Translation: Challenges and Solutions](https://www.wearedevelopers.com/videos/1157-leveraging-large-language-models-for-legacy-code-translation-challenges-and-solutions) - [Improving quality with Agentic AI with Rovo Dev and Xray](https://www.wearedevelopers.com/videos/2005-improving-quality-with-agentic-ai-with-rovo-dev-and-xray) - [PySpark - Combining Machine Learning & Big Data](https://www.wearedevelopers.com/videos/44-pyspark-combining-machine-learning-big-data) - [Building a hypercar from scratch](https://www.wearedevelopers.com/videos/607-building-a-hypercar-from-scratch) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [A Guide to Green Tech and Green IT Careers](https://www.wearedevelopers.com/magazine/374-a-guide-to-green-tech-and-green-it-careers) - [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [From developer to manager – what does it take to become an engineering manager?](https://www.wearedevelopers.com/magazine/42-from-developer-to-manager-what-does-it-take-to-become-an-engineering-manager) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)