- Company: Cfs Energy
- Location: Devens, Massachusetts
- Salary: Pay not listed
Cfs Energy at a glance
Cfsenergy maps to Commonwealth Fusion Systems, a commercial fusion company scaling magnets, plants, and AI-backed engineering with partners such as Google, Siemens, and NVIDIA.
Senior Mechanical Engineer - Assembly Equipment at Cfsenergy in Devens, Massachusetts (Full Time, No Remote)
Role Overview
At Commonwealth Fusion Systems, we are 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. Join us as a Senior Mechanical Engineer on the Assembly Team where you will design, develop, and manage fabrication of unique tooling needed for the successful assembly and integration of the SPARC tokamak device.
Your Responsibilities
- Develop overall concept, engineering, and use strategy for each tool assembly and its corresponding assembly step.
- Collaborate closely with system teams to find efficient, creative, cost-effective, and safest ways to manipulate, guide, and integrate parts of the tokamak system.
- Design and build tools needed for complex, large, and critical assemblies.
- Create work-instruction packets that guide tool use during assembly.
- Guide completion of challenging SPARC assembly tasks with your expertise on our most complex tools.
Qualifications
- Experience in mechanical engineering, particularly in the design and fabrication of complex systems.
- Knowledge of tokamak assembly processes and tooling development.
- Ability to work collaboratively with cross-functional teams.
- Strong problem-solving skills and attention to detail.
Working at Cfsenergy
Join the power movement as a Senior Mechanical Engineer. We are looking for thinkers, doers, builders, and makers who will bring new perspectives, solve tough problems, and thrive as part of a team. If this role fits your career goals, we want to hear from you.
Applying for This Role
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Explore Cfs Energy online
What people say about Cfs Energy
Available chatter is hiring-thread visibility on Hacker News, not scored workplace reviews.
- Ask HN: Who is hiring? (December 2024)
- Ask HN: Who is hiring? (August 2024)
- Ask HN: What would it take to go from 0 to contributing to fusion research?
- Ask HN: Who is hiring? (September 2022)
Recent news
- Commonwealth Fusion Systems Accelerates Commercial Fusion With Siemens and NVIDIA, Leveraging AI-Powered Digital Twins - Commonwealth Fusion Systems
- Commonwealth Fusion Systems Raises $863 Million Series B2 Round to Accelerate the Commercialization of Fusion Energy - Commonwealth Fusion Systems
- Commonwealth Fusion Systems to Build World’s First Commercial Fusion Power Plant in Virginia - Commonwealth Fusion Systems
- Google and Commonwealth Fusion Systems Sign Strategic Partnership - Commonwealth Fusion Systems
- ARC: Putting fusion energy on the grid - Commonwealth Fusion Systems
Aggregated from public discussions and news; opinions are the authors’ own.
Working in Devens, Middlesex County
Weather right now in Devens, Middlesex County: checking… · Local time: · Air quality: · Daylight: · UV index: · Wind: · Pollen:
Devens is a small Massachusetts enterprise zone on the former Fort Devens site across Ayer, Shirley, and Harvard. Role is on-site in Devens, Massachusetts.
- Quiet post-base campus feel; ~1,700 residents.
- State context: New England coastal commonwealth—see Massachusetts.
Massachusetts, officially the Commonwealth of Massachusetts, is a state in the New England region of the Northeastern United States. It borders the Atlantic Ocean and the Gulf of Maine to its east, Connecticut and Rhode Island to its south, New Hampshire and Vermont to its north, and New York to its west. Massachusetts is the seventh-smallest state by land area. With an estimated population of ove
Cost of living in Massachusetts: 5.8% above the national average — via BEA
Minimum wage in Massachusetts: $15.00/hr — via FRED
Real GDP per capita in Massachusetts: $90,044 — via FRED
Home prices in Massachusetts (year over year): +4.2% — via FRED
Median household income in Middlesex County: $126,779 — via US Census ACS / Data USA
Average commute time in Middlesex County: 30 min — via US Census ACS / Data USA
Most common commute in Middlesex County: Drove Alone (54%) — via US Census ACS / Data USA
Households with home internet in Middlesex County: 95% — via US Census ACS / Data USA
Typical climate: average high 60°F / low 37°F year-round (summers around 82°F, winters around 17°F) — via NOAA 1991-2020 Normals
- Elevation 82m (269 ft)
Source: Wikipedia (state)
Be ready on DFM for high-precision assembly, GD&T, fixturing, and how equipment choices affect throughput and quality on fusion-scale hardware. Walk through a past tooling or cell you owned end to end.
Strong match if you want on-site senior mech work building assembly systems for a funded fusion hardware company in Devens—not a remote desk role.
Job details above are provided by the employer/source. The sections on this page are compiled from public data sources with AI assistance.
Accommodations: if you need a workplace accommodation to apply for or perform this job, see ADA.gov or EEOC.gov for guidance on your rights and how to request one.
Listing facts
- Role Senior Mechanical Engineer – Assembly Equipment
- Employer Cfs Energy
- Location Devens, Massachusetts
- Type Full Time
- Pay (from listing) Pay not listed
- Posted August 19, 2026
- Apply by September 18, 2026
- Overview Full job description on this page (273 words)
Facts above come from this job record on Get A Job.AI — not copied from third-party review sites.
Public discussions & open sources
Attributed public threads and profiles — not employee reviews or star ratings.
- Hacker News — Ask HN: Who is hiring? (December 2024)
- Hacker News — Ask HN: Who is hiring? (August 2024)
- Hacker News — Ask HN: What would it take to go from 0 to contributing to fusion research?
- Hacker News — Ask HN: Who is hiring? (September 2022)
Cached public sources (Hacker News, Dev.to, GitHub, etc.).
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