Senior Mechanical Engineer

Commonwealth Fusion Systems
Devens, MA

Job Description

Job Description

About Commonwealth Fusion Systems:

Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy.

Combining decades of research, top talent, and new technologies, we’re designing and building commercially viable fusion power plants. And we're working with policymakers and suppliers to build the energy industry of the future.

We’re in the best position to make it happen. Since 2018, we’ve raised nearly $3 billion in capital, making us the largest and leading private fusion company in the world.

Now we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team.

If that’s you and this role fits, we want to hear from you.

Join the power movement as a Senior Mechanical Engineer

We are seeking a highly motivated and experienced Mechanical Engineer to join our manufacturing team. In this role, you will be responsible for providing technical expertise during the commissioning, implementation, and integration of manufacturing equipment. You will work closely with our production team to ensure that our manufacturing processes are optimized for efficiency, quality, and safety.

What you'll do:
  • Provide technical expertise during the commissioning, implementation, and integration of manufacturing equipment
  • Support Factory Acceptance Testing (FAT) and Site Acceptance Testing (SAT) of equipment
  • Troubleshoot mechanical issues and provide solutions to ensure equipment operates efficiently
  • Collaborate with production and engineering teams to optimize manufacturing processes and improve equipment performance
  • Drive continuous improvement initiatives for manufacturing equipment to increase efficiency, reduce downtime, and improve quality.
  • Conduct root cause analysis and implement corrective actions to resolve manufacturing issues
  • Ensure compliance with all safety requirements
  • Work with external vendors and suppliers to ensure the timely delivery of equipment and materials
  • Conceptualize and detail new manufacturing equipment for scaled up manufacturing processes
  • Run experiments to determine the feasibility of new manufacturing processes and translate those learnings into practical designs
What we're looking for:
  • Bachelor's degree in Mechanical Engineering or a related field
  • 7+ years of experience in mechanical engineering, with a focus on manufacturing equipment
  • 5+ years of manufacturing equipment and tooling design
  • Strong knowledge of mechanical systems, including hydraulics, pneumatics, and motion control
  • Experience with 3D CAD packages and 2D drawings
  • Experience with Factory Acceptance Testing (FAT) and Site Acceptance Testing (SAT) of equipment
  • Understanding of GD&T and its application
  • Excellent problem solving and analytical skills
  • Strong communication and interpersonal skills, with the ability to collaborate effectively with cross-functional teams
  • Experience with commissioning and startup of manufacturing equipment
Bonus points for:
  • Strong knowledge of mechanical systems, including hydraulics, pneumatics, and motion control
  • Experience developing manufacturing equipment and tooling for a novel process
  • Experience with production ramp-up and optimization of manufacturing processes
  • Experience with automated equipment and robotics
Must-have requirements:
  • Ability to lift up to 50 lbs occasionally
  • Perform activities such as typing, standing, stooping, and sitting, for extended periods of time
  • Willingness to occasionally travel or work required nights/weekends/on-call
  • Dedication to safety to mitigate hazards that may include heat, cold, noise, fumes, strong magnets, lead, high voltage, and cryogenics

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

#CFS-EX

At CFS, we excel in fast-paced environments, driven by our values of integrity, execution, impact, and self-critique. As we grow, we’re eager to bring on mission-driven folks who offer diverse perspectives and fresh ways to tackle challenges.

We value diversity deeply and are proud to be an equal opportunity employer by choice. We consider all qualified applicants equally, regardless of race, color, national origin, ancestry, citizenship status, protected veteran status, religion, physical or mental disability, marital status, sex, sexual orientation, gender identity or expression, age, or any other basis protected by law.

This role requires compliance with U.S. laws concerning the export of controlled or protected technologies or information (collectively, “Export Control Laws"). Any offer of employment will be contingent on the need for compliance with such Export Control Laws.

Posted 2026-05-09

Recommended Jobs

Senior Deposit Operations Specialist

Tremont Credit Union
Milton, MA

Job Description Job Description The Senior Deposit Operations Specialist is responsible for overseeing complex operational tasks related to deposit accounts, ensuring compliance with banking regu…

View Details
Posted 2026-04-17

Robotics Research Lead (Boston)

Onyx Robotics
Boston, MA

Company Description Onyx is a robotics AI controls and simulation company building the tooling and infrastructure to push hardware performance to its limits with learning. We are assembling a team o…

View Details
Posted 2026-04-27

Starbucks Barista/Cashier - Part Time - DoubleTree by Hilton Boston Downtown

Hilton
Boston, MA

A Starbucks Barista/Cashier (Part-Time) is responsible for greeting and serving guests beverages and/or food in the hotel's continuing effort to deliver outstanding guest service and financial profit…

View Details
Posted 2026-05-05

Registered Behavior Technician (RBT)- 5000 Sign On Bonus

Westborough Behavioral Healthcare Hospital
Westborough, MA

Looking for RBT's for our New Special Needs Unit $5000 Sign on bonus!! Shift details: Full-time 40 hours per week | Monday - Friday 8:00 AM - 4:30 PM; one weekend day a month. Job Summary …

View Details
Posted 2026-01-27

Caregiver DAYS

Associated Home Care
Agawam, MA

Associated Home Care is hiring Home Health Aides! Vaild HHA Certificate in hand Preferred Benefits: Competitive pay, direct deposit, holiday pay, higher weekend pay Flexible scheduling - pic…

View Details
Posted 2026-05-11

Surgery Residency Program Coordinator

Boston Medical Center
Brighton, MA

POSITION SUMMARY : Provides direction, leadership and day-to-day management of educational and departmental activities to include administrative support to the Residency Program Director of the…

View Details
Posted 2026-05-06

VP of Engineering

VDS Consulting Group
Boston, MA

VP of Engineering Value Driven Solutions (VDS) is looking for a VP of Engineering to join our interim executive bench, with this engagement deploying on-site at our PE-backed manufacturing client …

View Details
Posted 2026-05-03

Speech Language Pathology Assistant 50 to 55 per hour experience necessary

Boston Speech Therapy
Westfield, MA

Boston Speech Therapy is excited to announce an opening for a Speech Language Pathologist Assistant (SLPA) to join our dynamic team. Come work for a woman/SLP owned company. This role is ideal for…

View Details
Posted 2026-01-15