Lead Multi-Physics Simulation Engineer

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

Benefits offered by this job

Competitive compensation with equity

13 Company-wide Holidays

Flexible vacation days

10 sick days

Generous parental leave policy

Job summary

Commonwealth Fusion Systems in Milpitas, CA is seeking a Staff Modeling and Simulation Engineer to lead advanced multi-physics simulations for next-generation processing equipment. You will drive predictive validation across thermal, structural, fluid, and chemical regimes.

The role requires a PhD or MS with 10+ years in simulation, mastery of ANSYS or COMSOL, and the ability to mentor others while guiding hardware design decisions in a fast-paced, collaborative environment.

Qualifications

• Master’s or PhD in ME/AE/Physics with computational mechanics focus.
• 10+ years of simulation and predictive analysis experience in R&D.
• Expert in ANSYS and COMSOL or equivalent high-end FEA/CFD tools.
• Ability to translate simulation results into hardware modifications.

Responsibilities

• Lead advanced FEA and CFD for processing equipment.
• Run highly coupled multi-physics simulations.
• Implement simulation data management and V&V protocols.
• Provide analytical leadership during design reviews.
• Collaborate with Mechanical, Electrical, Materials teams.
• Own modeling milestones and report progress.
• Mentor junior staff in modeling methods.
• Identify design optimization paths from concept to prototype.

Skills

FEA / CFD expertise

Multi-physics modeling

Leadership

Cross-functional collaboration

Analytical reasoning

Education

Master’s or PhD in Mechanical/Aerospace/Physics with computational mechanics

Tools

ANSYS

COMSOL Multiphysics

Job description

Commonwealth Fusion Systems in Milpitas, CA is seeking a Staff Modeling and Simulation Engineer to lead advanced multi-physics simulations for next-generation processing equipment. You will drive predictive validation across thermal, structural, fluid, and chemical regimes.

The role requires a PhD or MS with 10+ years in simulation, mastery of ANSYS or COMSOL, and the ability to mentor others while guiding hardware design decisions in a fast-paced, collaborative environment.