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Molten Salt Jobs (NOW HIRING)

Commonwealth Fusion Systems

Molten Salt Engineer

Devens, MA · On-site

$70K - $120K/yr

Join the power movement as a Molten Salt Engineer Salt chemistry is a critical driver of corrosion, hydrogen speciation, and material behavior under irradiation. As the Blanket System team scales up ...

Commonwealth Fusion Systems

Molten Salt Engineer

Devens, MA · On-site

$70K - $120K/yr

Join the power movement as a Molten Salt Engineer Salt chemistry is a critical driver of corrosion, hydrogen speciation, and material behavior under irradiation. As the Blanket System team scales up ...

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Commonwealth Fusion Systems

Molten Salt Engineer

Devens, MA · On-site

$70K - $120K/yr

Join the power movement as a Molten Salt Engineer Salt chemistry is a critical driver of corrosion, hydrogen speciation, and material behavior under irradiation. As the Blanket System team scales up ...

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How much do molten salt jobs pay per hour?

As of Sep 6, 2026, the average hourly pay for molten salt in the United States is $16.01, according to ZipRecruiter salary data. Most workers in this role earn between $13.22 and $17.31 per hour, depending on experience, location, and employer.

What is a molten salt worker?

Molten salt workers are professionals who operate, monitor, and maintain systems that use molten salt, typically in industrial settings such as energy generation (especially molten salt reactors or concentrated solar power plants), chemical processing, or metallurgy. Their responsibilities include handling the safe transfer and storage of molten salt, maintaining equipment at high temperatures, and ensuring compliance with safety protocols. These workers require specialized training due to the unique properties and hazards associated with molten salts, such as high temperatures and corrosiveness.

What are the typical responsibilities of an engineer working with molten salt systems in the energy sector?

Engineers working with molten salt systems, especially in the energy sector, often focus on designing, operating, and maintaining thermal storage or reactor systems that use molten salt as a heat transfer or storage medium. Daily tasks may include monitoring system performance, managing safety protocols, troubleshooting equipment issues, and collaborating with multidisciplinary teams such as chemists and process engineers. Due to the unique properties of molten salts, engineers must also address challenges like corrosion, material compatibility, and temperature control to ensure efficient and safe operation. This role offers opportunities to contribute to innovative renewable energy solutions and advance in specialized technical or leadership positions.

What are the key skills and qualifications needed to thrive as a molten salt engineer, and why are they important?

To thrive as a Molten Salt Engineer, you need a strong background in chemical engineering, materials science, or nuclear engineering, often with a relevant bachelor's or master's degree. Familiarity with process simulation software, corrosion testing equipment, and safety protocols for handling high-temperature materials is essential. Strong problem-solving skills, attention to detail, and effective teamwork are crucial soft skills in this role. These competencies ensure safe, efficient operation and innovation in molten salt systems, which are vital for applications like energy storage and advanced nuclear reactors.

What is the difference between Molten Salt vs Nuclear Reactor Technician?

AspectMolten SaltNuclear Reactor Technician
Required CredentialsTechnical training, safety certificationsRadiation safety, reactor operation certifications
Work EnvironmentHigh-temperature molten salt systems, labs, research facilitiesNuclear power plants, reactor control rooms
Industry UsageResearch, energy storage, advanced reactor designsOperational nuclear power plants, maintenance

While both roles involve working with nuclear-related technologies, Molten Salt specialists focus on handling and researching molten salt systems used in energy storage and advanced reactors, whereas Nuclear Reactor Technicians operate and maintain existing nuclear reactors. The skills and certifications overlap in safety and technical knowledge, but their work environments and specific responsibilities differ significantly.

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Molten Salt jobs near you
Infographic showing various Molten Salt job openings in the United States as of August 2026, with employment types broken down into 82% Full Time, 14% Part Time, 3% Contract, and 1% Nights. Highlights an 91% Physical, 3% Hybrid, and 6% Remote job distribution, with an average salary of $33,296 per year, or $16 per hour.

Molten Salt Engineer

Commonwealth Fusion Systems

Devens, MA • On-site

$70K - $120K/yr

Full-time

Medical, Dental, Vision, Retirement, PTO

Posted 4 days ago

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, 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 Molten Salt Engineer
Salt chemistry is a critical driver of corrosion, hydrogen speciation, and material behavior under irradiation. As the Blanket System team scales up to larger systems, maintaining precise control over salt chemistry is vital. We are seeking an entry-level Molten Salt Engineer to support our experimental testing operations. Initially, you will focus on executing standard operating procedures (SOPs), conducting routine materials testing, and maintaining rigorous quality controls. As you build familiarity with our systems, your role will expand to include experimental design, test cell design and construction, and leading projects in materials corrosion and blanket health monitoring. Ideal candidates will have a background in chemistry, chemical engineering, or a related discipline.
The Blanket System team has a strong culture of teamwork, supportive safety culture, and pragmatic risk management. We are looking for an engineer who will fit and actively contribute to this culture.
What you'll do:
  • Perform corrosion testing of novel materials in molten salts
  • Perform device testing in molten salts to obtain statistics on device performance
  • Design and build new test cells for molten salt R&D
  • Assist with lab maintenance and upkeep
  • Write and modify SOPs for safe handling of hazardous chemicals, including fluoride salts (FLiBe)

What we're looking for:
  • Bachelors degree in Chemistry, Chemical Engineering, Materials Engineering, Nuclear Engineering, Mechanical Engineering, or similar field
  • 0-2 years of work experience
  • Experience with R&D work in a chemical or engineering laboratory
  • Experience working with safety systems for hazardous chemicals
  • Ability to learn new skills/subject matter quickly
  • Ability to work effectively in a multidisciplinary team of engineers, scientists, technical staff and others
  • Ability to clearly express and critique ideas
  • Great communication and organizational skills
  • Strong problem solving skills, ability to approach new problems with creativity

Bonus points for:
  • High temperature chemistry
  • Molten salts
  • Electrochemistry
  • Ceramics
  • Python, MATLAB, or equivalent for data analysis
  • Building and commissioning new laboratory equipment
  • CAD software

Must-have requirements:
  • Ability to occasionally lift up to 50 lbs
  • Perform activities such as sitting, typing, standing, stooping, or climbing 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

$70,000 - $120,000 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
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.

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