{"id":3425086,"url":"https://alion.io/job/commonwealth-fusion-systems-senior-modeling-and-simulation-engineer","title":"Senior Modeling and Simulation Engineer","company":{"id":8705,"name":"Commonwealth Fusion Systems","domain":"cfs.energy","url":"https://alion.io/company/commonwealth-fusion-systems","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"A","score":85,"open_postings":5,"ghost_share":0,"stale_share":0.6,"repost_share":0,"time_to_fill_p50_days":54,"computed_at":"2026-11-02T06:13:15Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Milpitas, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":146000,"max":210000,"currency":"USD","period":"year","gross":null,"usd_annual":210000},"salary_estimate":null,"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ANSYS","optional":false},{"name":"Verification & Validation","optional":false}],"status":"live","first_seen_at":"2026-10-28T19:41:57Z","employer_posted_date":"2026-10-28","last_verified_at":"2026-11-02T15:38:39Z","board_verified":true,"closed_at":null,"days_open":4,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":4},"description":"Join the power movement as aSenior Modeling and Simulation Engineer\nWe’re looking for a Senior 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.\nThis 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.\nWhat you'll do:\n Execute Simulation and Modeling: Execute advanced Finite Element Analysis (FEA) and Computational Fluid Dynamics (CFD) for advanced processing equipment\nRun Multi-Physics Analysis: Build, run, and evaluate highly coupled simulations covering structural mechanics, high-temperature thermal management, fluid/gas flow dynamics, and chemical reaction kinetics\n Apply Engineering Best Practices: Implement engineering workflows for simulation data management, mesh convergence criteria, and rigorous verification and validation (V&V) protocols using physical test data\nDrive Design Reviews: Provide analytical leadership during technical design reviews, verifying structural margins, thermal stress distributions, and flow uniformity to guide design choices\nCollaborate & Interface: Partner closely with cross-functional teams, including Mechanical Designers, Electrical Engineers, Materials Scientists, and Chemical Specialists, to translate simulation insights into actionable hardware modifications\nProject Accountability: Own and report on modeling milestones, timelines, and computational resources to stakeholders, ensuring on-time and in-spec delivery\nGet Things Done: Act with speed to solve critical engineering bottlenecks, validating design optimization paths from concept through prototype deployment\nWhat we’re looking for:\nEducation: 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\nExperience: 7+ years of experience in simulation and predictive analysis of complex R&D systems\nSoftware Mastery: Advanced, hands-on expert in ANSYS, COMSOL Multi-physics, or equivalent high-end FEA/CFD simulation platforms\n Multi-Disciplinary Analytical Expertise: Proven track record of successfully running coupled simulations (e.g., fluid-structure interaction, thermal-structural behavior, and chemical reaction modeling)\nEmpirical Correlation: 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\nBonus points for:\nStandards Knowledge: Familiarity with applying industry codes to simulation-driven design validation\n Motion & Dynamics: Experience running transient dynamic simulations or modeling precision motion systems in extreme thermal environments\nMust-have requirements:\nAbility to lift up to 25 lbs occasionally\nPerform activities such as stooping, climbing, standing, sitting for extended periods of time\nWillingness to travel or work required nights/weekends/on-call occasionally\nDedication to safety to mitigate industrial hazards that may include 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