Senior Multi-Physics Modeling Engineer

Commonwealth Fusion Systems; Milpitas (CA); On-site; USD 130,000 - 200,000; Full time

Benefits offered by this job

Equity

Health, dental, and vision insurance

401(k) with employer matching

Parental leave

Professional growth opportunities

Job summary

Commonwealth Fusion Systems is seeking a Staff Modeling and Simulation Engineer to join our design team and lead advanced multi-physics simulations for next-generation fusion hardware. You will drive predictive validation of complex systems, partnering with Mechanical, Electrical, Materials, and Chemical specialists to translate insights into hardware improvements.

You are a senior practitioner in multi-physics modeling, comfortable with FEA/CFD tools, and capable of guiding design reviews while

Qualifications

• 10+ years of experience in simulation and predictive analysis of complex R&D systems
• Proven ability to run coupled simulations (e.g., fluid-structure interaction, thermal-structural behavior)
• Able to bridge virtual models with shop floor data using measurement metrics
• Experience leading cross-functional initiatives in a matrixed environment
• Familiarity with industry codes to simulation-driven design validation
• Experience running transient dynamic simulations or modeling precision motion systems in extreme thermal environments

Responsibilities

• Execute Simulation and Modeling: Lead advanced Finite Element Analysis (FEA) and CFD for processing equipment
• Run multi-physics analysis: Build, run, and evaluate highly coupled simulations across structural, thermal, fluid, and chemical regimes
• Apply engineering best practices: Implement workflows for simulation data management, mesh convergence, and V&V with physical test data
• Drive design reviews: Provide analytical leadership during design reviews, verify margins and flow uniformity
• Collaborate & interface: Partner with Mechanical, Electrical, Materials, and Chemical teams to translate insights into hardware changes
• Project accountability: Own and report milestones, timelines, and compute resources to stakeholders
• Mentor talent: Coach junior staff on modeling methodologies and practical application of FE principles
• Get things done: Solve bottlenecks and validate design optimization from concept to prototype deployment

Education

Master’s or PhD in Mechanical Engineering, Aerospace Engineering, Physics, or related field with heavy focus on computational mechanics and multi-physics modeling

Tools

ANSYS

COMSOL Multi-physics

Job description

Commonwealth Fusion Systems is seeking a Staff Modeling and Simulation Engineer to join our design team and lead advanced multi-physics simulations for next-generation fusion hardware. You will drive predictive validation of complex systems, partnering with Mechanical, Electrical, Materials, and Chemical specialists to translate insights into hardware improvements.

You are a senior practitioner in multi-physics modeling, comfortable with FEA/CFD tools, and capable of guiding design reviews while