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Mechanical Engineer

Gigascale Capital, Harvard, MA, United States


Location: Devens, MA.

Full‑time, on‑site.

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. We’re working with policymakers and suppliers to build the energy industry of the future. Since 2018, we’ve raised nearly $3 billion in capital, making us the largest and leading private fusion company in the world.

Job Title
Mechanical Engineer – Manufacturing

Responsibilities

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.

Create and maintain Process and Instrumentation Diagrams (P&IDs).

Understand and apply Geometric Dimensioning and Tolerancing (GD&T) principles.

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.

Qualifications

Bachelor's degree in Mechanical Engineering or a related field.

4+ years of experience in mechanical engineering, with a focus on manufacturing equipment.

3+ 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

Strong knowledge of mechanical systems, including hydraulics, pneumatics, and motion control.

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, or on‑call.

Dedication to safety to mitigate hazards that may include heat, cold, noise, fumes, strong magnets, lead, high voltage, and cryogenics.

Salary
$90,000 – $145,000 a year (plus equity and 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 U.S. locations.

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.

Company Values
At CFS, we excel in fast‑paced environments, driven by our values of integrity, execution, impact, and self‑critique.

Equal‑Opportunity Employer Statement
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.

Export Control Compliance
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 laws.

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