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Principal Safety Engineer
Commonwealth Fusion SystemsDevens, MA, United Statesfull_timeVerifiedPosted 29 Aug 2025
About the role
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 working with policymakers and suppliers to build the energy industry of the future.
We’re in the best position to make it happen. Since 2018, we’ve raised nearly $3 billion in capital, making us the largest and leading private 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 Principal Safety Engineer
We are seeking a highly skilled and motivated Principal Safety Engineer to join our team at CFS. The CFS Principal Safety Engineer will play a pivotal role in ensuring the safety of both the SPARC and future ARC projects; ambitious endeavors aimed at developing cutting-edge fusion power technology. In this role, you will be responsible for overseeing safety strategies, workflows, and practices for both projects, ensuring compliance with relevant codes, regulations, and industry standards. The CFS Principal Safety Engineer will collaborate with cross-functional teams, review and update safety guidance, support the definition of and response to major transients, and implement safety standards for various activities within the SPARC and ARC programs. The Principal Safety Engineer provides technical support for engineering design, assembly, commissioning, and operations for the SPARC Project and future ARC Projects. Safety Engineer focus areas include, but are not limited to Equipment Safety, Process Safety, and Operational Safety. This role supports overall EHS initiatives.
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.
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 working with policymakers and suppliers to build the energy industry of the future.
We’re in the best position to make it happen. Since 2018, we’ve raised nearly $3 billion in capital, making us the largest and leading private 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 Principal Safety Engineer
We are seeking a highly skilled and motivated Principal Safety Engineer to join our team at CFS. The CFS Principal Safety Engineer will play a pivotal role in ensuring the safety of both the SPARC and future ARC projects; ambitious endeavors aimed at developing cutting-edge fusion power technology. In this role, you will be responsible for overseeing safety strategies, workflows, and practices for both projects, ensuring compliance with relevant codes, regulations, and industry standards. The CFS Principal Safety Engineer will collaborate with cross-functional teams, review and update safety guidance, support the definition of and response to major transients, and implement safety standards for various activities within the SPARC and ARC programs. The Principal Safety Engineer provides technical support for engineering design, assembly, commissioning, and operations for the SPARC Project and future ARC Projects. Safety Engineer focus areas include, but are not limited to Equipment Safety, Process Safety, and Operational Safety. This role supports overall EHS initiatives.
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.
What you'll do:
- Safe Design
- Provides technical support for safe engineering design, build, and operations of SPARC and ARC Ensures that safety is designed into systems and that controls are incorporated and remain effective through design changes
- Review and support updated guidance for redundancy, fault tolerance, and quality levels in collaboration with relevant stakeholders, with specific focus on the needs of safety critical systems
- Ensures that all design projects comply with regulatory requirements including, but not limited to, those promulgated by the Occupational Safety and Health Administration (OSHA), and the Environmental Protection Agency (EPA)
- Development of code compliance analyses and engineering design guides based on industry standard codes and guidelines, to the extent to which they are applicable
- Applies engineering concepts and methodologies to enhance the delivery of the SPARC and ARC Tokamaks by providing a technologically advanced, safe, and reliable environment
- Partake in and review risk assessments (HAZOP, FMECA, JHA, etc.)
- Able to evaluate information and provide opinion as to the safety of a concept or design
- Transfer lessons learned from the aforementioned work to the ARC project, staying up to date on relevant progress in the fusion regulatory landscape
- Safe Build and Operation of SPARC and ARC
- Ensures safe, reliable, and a precisely controlled assembly, commissioning, and operating environment through development and management of safety programs specific to SPARC and ARC projects
- Conducts incident investigations and liaises with engineers, management, and health and safety regulatory authorities to identify causes of accidents and prevent their recurrence
- Identifies and reviews hazard, risk and opportunities on an ongoing and proactive basis and ensure that appropriate follow up actions are being implemented
- Leads action plans by identifying potential emergency situations, creating emergency communication plans that address operation or business disruptions
- Review assembly and construction activities, commissioning and test readiness reviews, and operational plans and procedures with a focus on safety
- Collaborate with relevant engineering and operations teams and EHS to ensure adherence to defined safety standards and guidelines
- Cross-Functional Partnerships
- In collaboration with the EHS and Radiation Protection teams, implements and administers safety programs that protect employees and redu
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