Staff Mechanical Engineer

Commonwealth Fusion Systems

• $130K — $200K *
Aerospace & Defense
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree in Mechanical Engineering or related field (or equivalent industrial experience)
  • 10+ years of experience, including 8+ years as a staff mechanical design engineer or engineering team lead
  • Ability to conceive novel solutions for complex engineering systems
  • Expertise in 3D modeling, preferably with SolidWorks and NX
  • Experience with FEA tools like COMSOL or ANSYS
  • Ability to select and qualify vendors for components or subsystems
  • Strong verbal and written communication skills with a focus on documentation

Responsibilities

  • Lead the design and implementation of advanced R&D equipment for thin film processing
  • Conduct design reviews for key mechanical subsystems
  • Generate and maintain interfaces with other engineering subsystems
  • Report on project progress to stakeholders
  • Collaborate effectively within a multi-disciplinary team
  • Mentor engineering staff to ensure timely and quality outcomes
  • Drive projects to completion with a focus on speed and efficiency

Benefits

  • Competitive compensation with equity
  • 13 company-wide holidays
  • Flexible vacation days
  • 10 sick days
  • Generous parental leave policy
  • Health, dental, and vision insurance
  • 401(k) with employer matching
  • Professional growth opportunities
  • Team-building activities
Full Job Description
Join the power movement as a Senior Mechanical Engineer

We're looking for a Senior Mechanical Engineer to join our R&D and equipment design team to help build the next generation of thin-film deposition technology. The Senior Mechanical Engineer will be responsible for the design and implementation of advanced R&D equipment and complex machinery. This role requires strong technical expertise, procedural discipline, and the ability to collaborate across engineering and technology functions to ensure safe, reliable, and high-performance equipment. If you enjoy working on complex design problems, mentoring others, and solving problems in a collaborative, fast-paced environment, this is your opportunity to make an impact.

What you'll do:

  • Lead the design and implementation of advanced R&D equipment for thin film processing, including ownership of key mechanical modules and sub-systems
  • 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 multi-disciplinary team of top scientists and engineers
  • Mentor engineering staff for effectiveness and delivery of on-time & in-spec outcomes
  • Get things done: drive projects, consistently deliver, act with speed


What we're looking for:

  • Bachelor's degree in Mechanical Engineering or related field (or equivalent industrial experience)
  • 10+ years of experience with 8+ years of experience working as a staff mechanical design engineer or engineering team lead in a relevant context: design and implementation of R&D systems and manufacturing equipment
  • Ability to conceive of novel solutions for complex engineering systems in challenging environments
  • Expertise with 3D modeling; preferred experience with SolidWorks and NX
  • Experience with COMSOL, ANSYS or other FEA tools
  • Ability to select and qualify vendors for components or subsystems
  • Demonstrated ability to lead in either direct or matrix structures
  • Strong verbal and written communication skills and a dedication to high-quality documentation


Bonus points for:

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


Must-have Requirements:

  • Ability to occasionally lift up to 50 lbs
  • Perform activities such as stooping, climbing, standing, or sitting for extended periods of time
  • Dedication to safety to mitigate 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/on-call occasionally


$130,000 - $200,000 a year

Salary range for this full-time position + equity + benefits. The actual salary will depend on level, location, qualifications, and experience. The range displayed on each job posting reflects new hire salaries for the position across all US locations.

Benefits include:

• Competitive compensation with equity

• 13 Company-wide Holidays

• Flexible vacation days

• 10 sick days

• Generous parental leave policy

• Health, dental, and vision insurance

• 401(k) with employer matching

• Professional growth opportunities

• Team-building activities

#LI-Onsite

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