<div><strong style="font-size:16px;">About Commonwealth Fusion Systems: </strong></div><div> </div><div><span style="font-size:16px;">Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy.</span></div><div> </div><div><span style="font-size:16px;">Combining decades of research, top talent, and new technologies, we’re designing and building commercially viable fusion power plants. And we're working with policymakers, suppliers, and many others to build the energy industry of the future.</span></div><div> </div><div><span style="font-size:16px;">We’re in the best position to make it happen. Since 2018, we’ve raised $4 billion of capital, making us the largest and leading fusion company in the world.</span></div><div> </div><div><span style="font-size:16px;">Now we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team. </span></div><div> </div><div><span style="font-size:16px;">If that’s you and this role fits, we want to hear from you.</span></div><div><br></div><div><strong style="font-size:16px;">Join the power movement as a </strong><strong>Staff Modeling and Simulation Engineer</strong></div><div><p>We’re looking for a Staff Modeling and Simulation Engineer to join our design team to help build next-generation hardware. In this role, you will serve as a lead technical expert for advanced simulations, driving the predictive validation of complex hardware systems.</p><p>This role requires a high-level practitioner in multi-physics simulation who can comfortably model complex interactions across thermal, structural, fluid flow, and chemical regimes. If you enjoy solving deeply complex physics problems, applying rigorous modeling standards, and working in a collaborative, fast-paced environment to deliver first-of-a-kind hardware, this is your opportunity to make an impact.</p></div><br><br><h3>What you'll do:</h3><ul><li><strong>Execute Simulation and Modeling:</strong> Lead advanced Finite Element Analysis (FEA) and Computational Fluid Dynamics (CFD) for advanced processing equipment</li><li><strong>Run Multi-Physics Analysis:</strong> Build, run, and evaluate highly coupled simulations covering structural mechanics, high-temperature thermal management, fluid/gas flow dynamics, and chemical reaction kinetics</li><li><strong>Apply Engineering Best Practices:</strong> Implement engineering workflows for simulation data management, mesh convergence criteria, and rigorous verification and validation (V&amp;V) protocols using physical test data</li><li><strong>Drive Design Reviews:</strong> Provide analytical leadership during technical design reviews, verifying structural margins, thermal stress distributions, and flow uniformity to guide design choices</li><li><strong>Collaborate &amp; Interface:</strong> Partner closely with cross-functional teams, including Mechanical Designers, Electrical Engineers, Materials Scientists, and Chemical Specialists, to translate simulation insights into actionable hardware modifications</li><li><strong>Project Accountability:</strong> Own and report on modeling milestones, timelines, and computational resources to stakeholders, ensuring on-time and in-spec delivery</li><li><strong>Mentor Talent:</strong> Coach and mentor junior engineering staff on modeling methodologies, simulation accuracy, and the practical application of finite element principles to real-world hardware</li><li><strong>Get Things Done:</strong> Act with speed to solve critical engineering bottlenecks, validating design optimization paths from concept through prototype deployment</li></ul><h3>What we’re looking for:</h3><ul><li><strong>Education:</strong> Master’s or PhD degree in Mechanical Engineering, Aerospace Engineering, Physics, or a related field with a heavy focus on computational mechanics and multi-physics modeling</li><li><strong>Experience:</strong> 10+ years of experience in simulation and predictive analysis of complex R&amp;D systems</li><li><strong>Software Mastery:</strong> Advanced, hands-on expert in ANSYS, COMSOL Multi-physics, or equivalent high-end FEA/CFD simulation platforms</li><li><strong>Multi-Disciplinary Analytical Expertise:</strong> Proven track record of successfully running coupled simulations (e.g., fluid-structure interaction, thermal-structural behavior, and chemical reaction modeling)</li><li><strong>Empirical Correlation:</strong> Ability to bridge the gap between virtual models and the shop floor by validating simulation results against physical test metrics like strain gauge data, thermal imaging, and flow sensors</li><li><strong>Leadership:</strong> Demonstrated ability to influence hardware design direction through analytical data and lead cross-functional initiatives in a matrixed environment</li></ul><h3>Bonus points for:</h3><ul><li><strong>Standards Knowledge:</strong> Familiarity with applying industry codes to simulation-driven design validation</li><li><strong>Motion &amp; Dynamics:</strong> Experience running transient dynamic simulations or modeling precision motion systems in extreme thermal environments</li></ul><h3>Must-have requirements: </h3><ul><li>Ability to lift up to 25 lbs occasionally</li><li>Perform activities such as stooping, climbing, standing, sitting for extended periods of time</li><li>Willingness to travel or work required nights/weekends/on-call occasionally</li><li>Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics</li></ul><br><div><span style="font-size:16px;">At CFS, we excel in fast-paced environments, driven by our values of integrity, execution, impact, and self-critique. As we grow, we’re eager to bring on mission-driven folks who offer diverse perspectives and fresh ways to tackle challenges.</span></div><div> </div><div><span style="font-size:16px;">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.</span></div><div> </div><div><strong style="font-size:16px;">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.</strong></div>

<p>The world needs a fundamentally new source of clean energy to meet our growing energy demands and combat climate change. Scientists have been studying fusion for decades and have made significant progress, but have yet to achieve its potential as a commercial power source. However, its promise has continued to drive interest with the understanding that successfully deployed fusion power would transform the world&rsquo;s energy landscape.</p>
<p>Commonwealth Fusion Systems (CFS) was spun out of MIT's Plasma Science and Fusion Center to leverage the decades of fusion research combined with the innovation and speed of the private sector. Supported by the world&rsquo;s leading investors in breakthrough energy technologies, the CFS team is uniquely positioned to deliver the fastest path to commercial fusion energy. CFS has assembled a world-class team to design and build fusion machines. This team includes experts in magnets, manufacturing, and plasma physics dedicated to the mission of delivering clean, limitless fusion power to the world.</p>

Staff Modeling and Simulation Engineer

<div><strong>About Commonwealth Fusion Systems: </strong></div><div> </div><div><span>Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy.</span></div><div> </div><div><span>Combining decades of research, top talent, and new technologies, we’re designing and building commercially viable fusion power plants. And we're working with policymakers, suppliers, and many others to build the energy industry of the future.</span></div><div> </div><div><span>We’re in the best position to make it happen. Since 2018, we’ve raised $4 billion of capital, making us the largest and leading fusion company in the world.</span></div><div> </div><div><span>Now we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team. </span></div><div> </div><div><span>If that’s you and this role fits, we want to hear from you.</span></div><div><br /></div><div><strong>Join the power movement as a </strong><strong>Staff Modeling and Simulation Engineer</strong></div><div><p>We’re looking for a Staff Modeling and Simulation Engineer to join our design team to help build next-generation hardware. In this role, you will serve as a lead technical expert for advanced simulations, driving the predictive validation of complex hardware systems.</p><p>This role requires a high-level practitioner in multi-physics simulation who can comfortably model complex interactions across thermal, structural, fluid flow, and chemical regimes. If you enjoy solving deeply complex physics problems, applying rigorous modeling standards, and working in a collaborative, fast-paced environment to deliver first-of-a-kind hardware, this is your opportunity to make an impact.</p></div><br /><br /><h3>What you'll do:</h3><ul><li><strong>Execute Simulation and Modeling:</strong> Lead advanced Finite Element Analysis (FEA) and Computational Fluid Dynamics (CFD) for advanced processing equipment</li><li><strong>Run Multi-Physics Analysis:</strong> Build, run, and evaluate highly coupled simulations covering structural mechanics, high-temperature thermal management, fluid/gas flow dynamics, and chemical reaction kinetics</li><li><strong>Apply Engineering Best Practices:</strong> Implement engineering workflows for simulation data management, mesh convergence criteria, and rigorous verification and validation (V&amp;V) protocols using physical test data</li><li><strong>Drive Design Reviews:</strong> Provide analytical leadership during technical design reviews, verifying structural margins, thermal stress distributions, and flow uniformity to guide design choices</li><li><strong>Collaborate &amp; Interface:</strong> Partner closely with cross-functional teams, including Mechanical Designers, Electrical Engineers, Materials Scientists, and Chemical Specialists, to translate simulation insights into actionable hardware modifications</li><li><strong>Project Accountability:</strong> Own and report on modeling milestones, timelines, and computational resources to stakeholders, ensuring on-time and in-spec delivery</li><li><strong>Mentor Talent:</strong> Coach and mentor junior engineering staff on modeling methodologies, simulation accuracy, and the practical application of finite element principles to real-world hardware</li><li><strong>Get Things Done:</strong> Act with speed to solve critical engineering bottlenecks, validating design optimization paths from concept through prototype deployment</li></ul><h3>What we’re looking for:</h3><ul><li><strong>Education:</strong> Master’s or PhD degree in Mechanical Engineering, Aerospace Engineering, Physics, or a related field with a heavy focus on computational mechanics and multi-physics modeling</li><li><strong>Experience:</strong> 10+ years of experience in simulation and predictive analysis of complex R&amp;D systems</li><li><strong>Software Mastery:</strong> Advanced, hands-on expert in ANSYS, COMSOL Multi-physics, or equivalent high-end FEA/CFD simulation platforms</li><li><strong>Multi-Disciplinary Analytical Expertise:</strong> Proven track record of successfully running coupled simulations (e.g., fluid-structure interaction, thermal-structural behavior, and chemical reaction modeling)</li><li><strong>Empirical Correlation:</strong> Ability to bridge the gap between virtual models and the shop floor by validating simulation results against physical test metrics like strain gauge data, thermal imaging, and flow sensors</li><li><strong>Leadership:</strong> Demonstrated ability to influence hardware design direction through analytical data and lead cross-functional initiatives in a matrixed environment</li></ul><h3>Bonus points for:</h3><ul><li><strong>Standards Knowledge:</strong> Familiarity with applying industry codes to simulation-driven design validation</li><li><strong>Motion &amp; Dynamics:</strong> Experience running transient dynamic simulations or modeling precision motion systems in extreme thermal environments</li></ul><h3>Must-have requirements: </h3><ul><li>Ability to lift up to 25 lbs occasionally</li><li>Perform activities such as stooping, climbing, standing, sitting for extended periods of time</li><li>Willingness to travel or work required nights/weekends/on-call occasionally</li><li>Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics</li></ul><br /><div><span>At CFS, we excel in fast-paced environments, driven by our values of integrity, execution, impact, and self-critique. As we grow, we’re eager to bring on mission-driven folks who offer diverse perspectives and fresh ways to tackle challenges.</span></div><div> </div><div><span>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.</span></div><div> </div><div><strong>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.</strong></div>

Staff Modeling and Simulation Engineer

About the Job

About the Company

Commonwealth Fusion Systems (CFS)

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