
Staff Process Engineer
Commonwealth Fusion Systems · Devens, MA
- Level
- Senior
- Team
- Process
- Degree
- Required
- Experience asked
- 10+ years
- Industry
- Industrial
- Posted
- Today
The role in 30 seconds
A senior process role at Commonwealth Fusion Systems (industrial) in Devens, MA. At CFS, you will work across cryogenics (nitrogen and helium), power generation (steam), molten salts (FLiBe), fueling (deuterium-tritium), gas processing, vacuum systems, and utilities.
- They ask for
- 10+ years · degree required
Read from the posting. The full description is below.
From the plant jobs report · week of October 26, 2026
Process Engineer roles in Massachusetts: typical posted base $108k–$149k.
Median of the low and high ends of 15 live postings that list pay, out of 31 process engineer openings in Massachusetts, read from manufacturers' own careers sites.
Massachusetts plant jobs report →Pay by team and state →What moves pay →
How this role compares
Against 30 other live process postings in Massachusetts.
- Base pay
- Not listed in this posting
- Experience asked
- More than usual (10+ vs 5+)
Typical $108k–$149k, from 15 postings that list pay.
Similar roles usually ask 5+ years.
Skills these teams ask for most
- Root cause 45%
- Validation (IQ/OQ/PQ) 29%
- Team leadership 23%
- Automation 23%
- SPC 23%
✓ = this posting asks for it too. % = share of similar postings that mention it.
At a glance
Pulled from the posting text. If it's not listed here, the posting didn't say.
How to get in at this plant
Five moves over a week or two. The first one takes ten minutes.
- 1
Pick 2–3 people on the Process team at Commonwealth Fusion Systems
We found 4 people at this company and state: 3 in this kind of role, 1 leaders. Engineers who joined in the last year or two reply the most. See them ↓
- 2
Send a short, curious note
One real question about their work. No favors yet. Each person gets a different note, written for this role.
Write to Alex → (free) - 3
Turn a reply into a short call
Questions worth asking about this team:
- What does a normal week look like on your team?
- Is the work mostly new product launches or sustaining existing lines?
- How much time do you spend on the floor versus at a desk?
- How did you land the job? What stood out in your interviews?
- 4
Apply with someone vouching for you
If the call went well, ask whether they’d pass your résumé to the hiring manager. Send your résumé link, apply that day, and let them know.
- 5
Bring proof to the interview
One page of before-and-after numbers from projects you led: scrap, OEE, cycle time, cost. Plant managers hire on results.
This plant: Commonwealth Fusion Systems in Devens
19 other open roles at this site · 4 people we found in process roles at Commonwealth Fusion Systems.
- Production Technician Supervisor - First Shift · Production · Supervisor
- Senior Quality Engineer · Quality · Senior
- Senior Manufacturing Engineer - Second Shift · Manufacturing · Senior
- Senior Controls Engineer · Controls · Senior
- Controls Engineer · Controls
- Production Technician Supervisor - Second Shift · Production · Supervisor
Full description from Commonwealth Fusion SystemsAs posted on their careers site.ShowHide
requirements
into practical industrial systems, and guiding complex designs from early concepts through Front-End Loading (FEL), detailed engineering, construction, and operation.
Fusion power plants bring together technologies that traditionally span multiple industries. At CFS, you will work across cryogenics (nitrogen and helium), power generation (steam), molten salts (FLiBe), fueling (deuterium-tritium), gas processing, vacuum systems, and utilities. Acting as a domain expert, you will apply real world, hands-on experience to build process design bases from scratch for ambiguous projects, develop heat and material balances, size equipment, own P&IDs, lead HAZOPs, support start-up, and troubleshoot operating systems.
What you'll do
- ◆Own the process engineering scope for complex systems with loosely-defined outcomes, guiding them from early concept through operation with near complete independence
- ◆Translate fundamental engineering
requirements
into commercially viable systems, navigating semi-ambiguous challenges to develop process design bases, operating envelopes, PFDs, heat/material and utility balances, P&IDs, and process datasheets
- ✓Apply chemical engineering fundamentals (thermodynamics, phase equilibrium, fluid mechanics, heat and mass transfer, transport phenomena, reaction engineering, separations, and process control) to resolve complex technical challenges and define operating boundaries
- ✓Develop steady-state and dynamic process models using engineering analysis to guide process design, system architecture, and equipment selection
- ✓Size, specify, and evaluate process equipment, working directly with suppliers, fabricators, and internal multidisciplinary teams to evaluate technical tradeoffs (performance, safety, cost)
- ✓Drive engineering through a phase-gated design process, progressively maturing systems from conceptual to engineering definition
- ✓Lead process safety activities, including HAZOPs, design reviews, and relief/depressurization studies, and develop control philosophies and interlocks in collaboration with controls engineers
- ✓Support field execution by generating detailed work and commissioning plans, test procedures, and start-up strategies, actively participating in system commissioning and performance testing
- ✓Troubleshoot operating equipment using first-principles engineering and field data, translating lessons learned into process improvements, new tools, and department policies
- ✓Provide technical leadership, manage medium-to-large project risks by driving solutions, and mentor less-experienced engineers on complex process engineering problems
requirements
into commercial-scale equipment and facilities
- ✓Deep expertise developing core process engineering deliverables (design bases, PFDs, P&IDs, heat/material balances) and sizing/selecting industrial process equipment
- ✓Hands-on experience commissioning, operating, and troubleshooting physical equipment alongside operators, using field observations to diagnose performance
- ✓Proficiency with process simulation tools (e.g., EcoSim, Aspen HYSYS/Plus, AVEVA) and extensive experience applying industry codes and standards (such as ASME B31.3,ASME BPVC Section VIII, API 520/521) to establish process design boundaries, fluid service classifications, operating envelopes, and relief/depressurization cases
- ✓Strong background in process safety, hazard identification and risk analysis (e.g., HAZOP), and relief system design
- ✓Experience integrating cross-functional engineering disciplines and working directly with vendors, EPC organizations, or construction contractors
- ✓Ability to independently manage medium risks, drive solutions for larger project risks, and exercise strong engineering judgment to ensure practical, commercially viable designs
- ✓Values that align with our company’s values of integrity, execution, impact, and self-critique
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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, suppliers, and many others to build the energy industry of the future.
We’re in the best position to make it happen. Since 2018, we’ve raised $4 billion of capital, making us the largest and leading 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 Staff Process Engineer
CFS is looking for a Staff Process Engineer with deep chemical engineering fundamentals and extensive experience scaling up, commissioning, and operating systems in large industrial facilities (e.g., power generation, LNG, petrochemicals, or cryogenics). You excel at navigating loosely-defined outcomes, translating fundamental
What we're looking for
- •Bachelor’s degree in Chemical Engineering (or closely related discipline)
- •10+ years of relevant industrial process engineering experience (potentially fewer if a PhD), or equivalent demonstrated depth of experience
- •Demonstrated deep domain expertise (or broad expertise across domains) with a proven ability to independently own complex, semi-ambiguous work, seeking support only when needed
- •Strong command of chemical engineering fundamentals and a proven track record taking systems through a structured FEL or phase-gated development process
- •Experience scaling up loosely-defined process
Bonus points for
- +Experience with large-scale cryogenic systems (particularly supercritical or liquid helium) and industrial high-vacuum systems
- +Background in large-scale process facilities (power generation, petrochemical, LNG, industrial gases, nuclear)
- +Expertise in steam systems, molten salt sy
