Senior Mechanical Engineer

Commonwealth Fusion Systems•Milpitas, CA

24d•$146,000 - $210,000•Onsite

About The Position

Commonwealth Fusion Systems is seeking a Senior Mechanical Engineer to join its R&D and equipment design team and help build the next generation of thin-film deposition technology. The role is responsible for designing and implementing advanced R&D equipment and complex machinery, with an emphasis on technical expertise, procedural discipline, safety, reliability, and high performance. The engineer will collaborate across engineering and technology functions, lead mechanical subsystem design and reviews, report project progress, and mentor engineering staff in a collaborative, fast-paced environment.

Requirements

Bachelor's degree in Mechanical Engineering or a related field, or equivalent industrial experience.
8+ years of experience, including 7+ years working as a senior mechanical design engineer or engineering team lead in a relevant context, such as the design and implementation of R&D systems and manufacturing equipment.
Ability to conceive novel solutions for complex engineering systems in challenging environments.
Expertise with 3D modeling.
Experience with COMSOL, ANSYS, or other FEA tools.
Ability to select and qualify vendors for components or subsystems.
Demonstrated ability to lead in direct or matrix structures.
Strong verbal and written communication skills and dedication to high-quality documentation.
Ability to occasionally lift up to 50 lbs.
Ability to perform activities such as stooping, climbing, standing, or sitting for extended periods.
Dedication to safety when mitigating industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics.
Willingness to travel or work required nights, weekends, or on-call occasionally.

Nice To Haves

Preferred experience with SolidWorks and NX.
Prior success building first-of-kind or experimental tools for material science or semiconductor R&D.
Familiarity with applying Semi-S8, ASME, ACI, ASTM, and other mechanical standards to design solutions.
Experience operating equipment in a manufacturing environment.

Responsibilities

Lead the design and implementation of advanced R&D equipment for thin-film processing, including ownership of key mechanical modules and subsystems.
Lead design reviews for key mechanical subsystems.
Generate and maintain interfaces with other engineering subsystems.
Report on and be accountable for project progress to stakeholders.
Work effectively within a multidisciplinary team of scientists and engineers.
Mentor engineering staff to support effectiveness and on-time, in-spec delivery.
Drive projects and consistently deliver results with speed.