About Acceleron Fusion

Acceleron Fusion is a venture-backed clean energy startup developing breakthrough fusion technology. Founded to commercialize Department of Energy-funded research, we completed our Series A funding round and are working with leading research institutions like the Paul Scherrer Institute and Oak Ridge National Laboratory at the forefront of fusion energy innovation. Headquartered in Cambridge, MA, we are a growing startup of about 20 employees. As a key member of our small and dynamic team, you'll have the opportunity to make a significant impact on our technology and shape the future of both our company and the field of fusion energy.

About this role

We’re looking for a hands-on, scientifically-minded individual to join our team as a Junior/Associate Lab Technician. In this role, you will be instrumental in the fabrication of parts and assembly of components for our cutting-edge muon-catalyzed fusion research apparatus. This position offers a unique opportunity to gain experience across all aspects of our research, including mechanical, electrical, chemical, and vacuum systems. It is ideal for someone passionate about building and excited to contribute to ground-breaking fusion research.

What you’ll do:

• Experimental Assembly & Monitoring: Build and assemble precision components, leak-test vacuum hardware, and assist in monitoring experiments during active runs.
• Fabrication & Machining: Program and operate CNC mills, lathes, and 3D printers to create prototype parts. (We are happy to train the right candidate on advanced CNC workflows).
• Shop Stewardship: Assist in the setup, organization, and safety of our machine shop in Cambridge.
• Field Integration: Travel with the team for several weeks per year to help install, align, and troubleshoot mechanical systems at partner labs in Switzerland, Vancouver, and New York.
• Design Support: Collaborate with scientists and engineers to improve designs for manufacturability.

What we’re looking for:

• Recent graduate with a degree in Physics, Mechanical, Electrical, or Chemical Engineering, or related technical field, or comparable work experience in a technical laboratory or manufacturing environment.
• A “maker” history with a strong portfolio of projects you’ve built or worked on. 
• Familiarity with CAD software, and experience with CNC machining or a strong desire to learn.
• Demonstrated ability to troubleshoot complex systems in a fast-paced, startup environment.
• Strong communication and collaboration skills, able to work effectively within a small, tight-knit team.
• Hands-on experience with low-voltage wiring and control circuits.

Preferred qualifications (not required):

• Experience with Solidworks.
• Hands-on familiarity with vacuum, cryogenic, or pneumatic systems.
• Basic experience with welding (MIG/TIG/Laser).

Details & Logistics:

• This is a full-time, onsite role working from our facility in Cambridge, MA. Preference will be given to candidates already in the Greater Boston area.
• Travel (including international) for several weeks per year is required.
• Our benefits package includes health & dental insurance, retirement savings with company contribution, stock options, paid time off, and 11 company holidays.
• The salary range for this role is $50K to $70K. This range represents the minimum and maximum base compensation Acceleron Fusion reasonably expects to pay for this position. The specific salary offered will be determined based on relevant factors including skills, experience, qualifications, and location. This position may also be eligible for additional compensation such as bonuses, equity, or other benefits.
• Successful applications will include pictures of parts you have made or machines/systems you have built.

#LI-Onsite

About us

Acceleron Fusion is developing muon‑catalyzed fusion—a path to clean, abundant energy. Building on research sponsored by the U.S. DOE, we have recently raised a $24M Series A venture capital round and have already logged 100+ hours of muon-catalyzed fusion in tests at the Paul Scherrer Institute. Our collaborators include PSI, Oak Ridge, Argonne, Fermilab, and several universities. Join a team where fundamental physics meets application-oriented engineering, and your designs could help move our technology from the laboratory to a commercial energy source.

We have an opening for an Experimental Physicist who will play a key role in the design and optimization of muon production systems for our fusion technology.

What you'll do:

• Design and optimize particle accelerator systems and beamlines for muon production
• Develop simulation models of accelerators and beams to analyze beam dynamics and particle interactions
• Collaborate cross-functionally to integrate accelerator designs into our fusion system
• Contribute to experimental planning and data analysis
• Help establish technical specifications for system components
• Author technical papers and contribute to the company's scientific publications, presenting research at scientific conferences

What we're looking for:

• PhD in Physics, Electrical Engineering, or a related field, preferably with a focus on accelerator physics
• Strong understanding of beam dynamics and accelerator systems
• Demonstrated understanding of accelerator physics principles for beamlines, synchrotrons, and storage rings, including the theory of polarized beams
• Experience with particle accelerator simulation tools
• Track record of working successfully with other scientists and engineers to solve complex technical challenges
• Excellent analytical and problem-solving abilities
• Strong communication and collaboration skills, and ability to work in a fast-paced team

Preferred Qualifications (not required)

• Post-doctoral research experience in accelerator physics
• Hands-on experience with physics/particle accelerator operations or development
• Background in muon physics or muon beamline design
• Familiarity with high-frequency electronics or RF accelerator components.
• Experience with safety systems for high-power or high-voltage electronics.
• Programming skills in Python, MATLAB, or similar tools
• CAD software proficiency (e.g. SolidWorks, AutoCAD)

Details and Logistics:

• This is a full-time, onsite role working from our facility in Cambridge, MA.
• Travel (including international) for several weeks per year is required.
• Our benefits package includes health & dental insurance, retirement savings with company contribution, stock options, paid time off, and 11 company holidays.
• The salary range for this role is $110,000 to $150,000. This range represents the minimum and maximum base compensation Acceleron Fusion reasonably expects to pay for this position. The specific salary offered will be determined based on relevant factors including skills, experience, qualifications, and location. This position may also be eligible for additional compensation such as bonuses, equity, or other benefits.

#LI-Onsite

About Acceleron Fusion:
Acceleron Fusion is developing muon‑catalyzed fusion—a path to clean, abundant energy. Building on research sponsored by the U.S. DOE, we have recently raised a $24M Series A venture capital round and have already logged 100+ hours of muon-catalyzed fusion in tests at the Paul Scherrer Institute. Our collaborators include PSI, Oak Ridge, Argonne, Fermilab, and several universities. Join a team where fundamental physics meets application-oriented engineering, and your designs could help move our technology from the laboratory to a commercial energy source.

About this role:
We’re looking for a high-voltage electrical systems engineer to design advanced beam-control hardware for our fusion experiments. You will develop high-voltage and RF solutions that enable precise manipulation of particle beams at energies from kilovolts to megavolts.  

What you’ll do:

• Analyze, model, and mitigate electrical-breakdown and insulation challenges in high-voltage structures and circuits.
• Design kilovolt-to-megavolt electrostatic systems—for example using Marx generators, Cockcroft‑Walton stacks, or Pelletrons —for particle beam acceleration and cooling.
• Architect RF power and energy recovery systems using Klystrons, Magnetrons, waveguides, and similar components.
• Build multiphysics models incorporating electromagnetics, heat transfer, fluid flow, and particle transport.
• Build prototypes and conduct lab tests.
• Generate clear design docs, test plans, and risk analyses that support rapid iteration and safe operations.
• Travel with the team (including international travel) to integrate your hardware at beamline facilities and carry out experiments.

What we’re looking for:

• B.S., M.S., or Ph.D. in Electrical Engineering, Physics, or a closely related field.
• Five years experience designing high voltage or pulsed power systems.
• Proficiency with COMSOL, ANSYS, or similar multiphysics simulation tools.
• Proficiency with circuit design tools (e.g. Altium).
• Hands‑on lab experience: high voltage safety standards and best practices; lab instrumentation; practical troubleshooting.
• Thoughtful collaboration skills, able to interact and work closely with people from other technical disciplines and backgrounds.
• Demonstrated time management and organizational skills.
• Excellent written and verbal communication abilities.

Preferred Qualifications (not required):

• Experience with particle accelerators, charged particle optics, or high vacuum systems.
• Proficiency with GEANT4, FLUKA, MCNP, or similar Monte Carlo simulation tools.

Details & Logistics:

• This is a full-time, onsite role working from our facility in Cambridge, MA.
• Travel (including international) for several weeks per year is required.
• Our benefits package includes health & dental insurance, retirement savings with company contribution, stock options, paid time off, and 11 company holidays.
• The salary range for this role is $110K to $150K. This range represents the minimum and maximum base compensation Acceleron Fusion reasonably expects to pay for this position. The specific salary offered will be determined based on relevant factors including skills, experience, qualifications, and location. This position may also be eligible for additional compensation such as bonuses, equity, or other benefits.
• Candidates who don’t meet all of our requirements are encouraged to apply.

#LI-Onsite

About us

Acceleron Fusion is developing muon‑catalyzed fusion—a path to clean, abundant energy. Building on research sponsored by the U.S. DOE, we have recently raised a $24M Series A venture capital round and have already logged 100+ hours of muon-catalyzed fusion in tests at the Paul Scherrer Institute. Our collaborators include PSI, Oak Ridge, Argonne, Fermilab, and several universities. Join a team where fundamental physics meets application-oriented engineering, and your designs could help move our technology from the laboratory to a commercial energy source.

We have an opening for an Accelerator Physicist who will play a key role in the design and optimization of muon production systems for our fusion technology.

What you'll do:

• Design and optimize particle accelerator systems and beamlines for muon production
• Develop simulation models of accelerators and beams to analyze beam dynamics and particle interactions
• Collaborate cross-functionally to integrate accelerator designs into our fusion system
• Contribute to experimental planning and data analysis
• Help establish technical specifications for system components
• Author technical papers and contribute to the company's scientific publications, presenting research at scientific conferences

What we're looking for:

• PhD in Physics, Electrical Engineering, or a related field, preferably with a focus on accelerator physics
• Strong understanding of beam dynamics and accelerator systems
• Demonstrated understanding of accelerator physics principles for beamlines, synchrotrons, and storage rings, including the theory of polarized beams
• Experience with particle accelerator simulation tools
• Track record of working successfully with other scientists and engineers to solve complex technical challenges
• Excellent analytical and problem-solving abilities
• Strong communication and collaboration skills, and ability to work in a fast-paced team

Preferred Qualifications (not required)

• Post-doctoral research experience in accelerator physics
• Hands-on experience with physics/particle accelerator operations or development
• Background in muon physics or muon beamline design
• Familiarity with high-frequency electronics or RF accelerator components.
• Experience with safety systems for high-power or high-voltage electronics.
• Programming skills in Python, MATLAB, or similar tools
• CAD software proficiency (e.g. SolidWorks, AutoCAD)

Details and Logistics:

• This is a full-time, onsite role working from our facility in Cambridge, MA.
• Travel (including international) for several weeks per year is required.
• Our benefits package includes health & dental insurance, retirement savings with company contribution, stock options, paid time off, and 11 company holidays.
• The salary range for this role is $110,000 to $150,000. This range represents the minimum and maximum base compensation Acceleron Fusion reasonably expects to pay for this position. The specific salary offered will be determined based on relevant factors including skills, experience, qualifications, and location. This position may also be eligible for additional compensation such as bonuses, equity, or other benefits.

#LI-Onsite

If you're excited about muon-catalyzed fusion but don't see the right role for you on our website, please submit your resume for future consideration! We're always on the lookout skilled, collaborative people who are excited to roll up their sleeves and make fusion a reality. 

Let us know why you believe your skills and experience align with the Acceleron Fusion's goals, and how you foresee contributing to the team. All applications are read by actual humans and we will flag your application for future roles if we see a good match.

Please note that at this time we are only looking to hire people who can work onsite from our office in Cambridge, MA.