Commonwealth Fusion Systems is developing commercially viable fusion power plants, having raised over $2 billion in capital since 2018.

Commonwealth Fusion Systems is at the forefront of fusion energy development, working to revolutionize the energy industry. As an Associate Vacuum Systems Engineer, you'll play a crucial role in the SPARC project - a cutting-edge fusion energy plant under construction in Devens, MA. The position offers an exciting opportunity to work with advanced vacuum pumping systems, which are vital components of the plant.

The role combines hands-on technical work with strategic system maintenance and optimization. You'll be responsible for installing and commissioning vacuum pumping systems, conducting crucial maintenance, and ensuring system reliability. This position is perfect for someone with strong technical skills who wants to contribute to groundbreaking energy technology.

The company offers an impressive benefits package, including competitive compensation with equity, comprehensive health coverage, and professional development opportunities. With over $2 billion in capital raised since 2018, CFS is well-positioned to achieve its mission of delivering the urgent transition to fusion energy.

You'll be joining a dynamic team of thinkers, doers, and builders who are passionate about solving one of the world's most pressing energy challenges. The role offers unique exposure to cutting-edge technology and the chance to be part of a team that's literally building the future of energy production.

The position requires a combination of technical expertise and practical skills, with opportunities for growth and learning. You'll work in a fast-paced environment driven by values of integrity, execution, impact, and self-critique. The company strongly values diversity and maintains an inclusive workplace culture.

Associate Vacuum Systems Engineer role at Commonwealth Fusion Systems, working on cutting-edge fusion energy technology with competitive compensation and benefits.

Associate Vacuum Systems Engineer

Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy, designing and building commercially viable fusion power plants.

Commonwealth Fusion Systems (CFS) is at the forefront of fusion energy development, having raised over $2 billion in capital since 2018. As a Principal Environmental Engineer, you'll play a crucial role in shaping the future of sustainable energy production.

The position combines technical leadership with environmental stewardship, requiring expertise in environmental regulations and compliance. You'll be responsible for designing and implementing environmental management systems, overseeing complex projects, and ensuring regulatory compliance across the organization. The role demands strong analytical skills to assess environmental risks and develop mitigation strategies.

Working at CFS means joining a mission-driven team focused on delivering the urgent transition to fusion energy. The company values diversity and maintains a fast-paced environment driven by integrity, execution, impact, and self-critique. You'll collaborate with cross-functional teams to drive ESG initiatives and improve sustainability metrics.

The compensation package is competitive, ranging from $150,000 to $250,000 annually, plus equity and comprehensive benefits. The position offers professional growth opportunities and the chance to work with cutting-edge fusion technology. Located in the Boston area, you'll be part of a team working to revolutionize the energy industry.

Key responsibilities include managing environmental permits, interfacing with regulatory agencies, and staying current with environmental technologies and regulations. The ideal candidate will have 10+ years of experience in environmental consulting or industrial environmental management, preferably in complex technical environments.

This role is perfect for someone who combines technical expertise with strong leadership skills and a passion for sustainable energy. You'll have the opportunity to make a significant impact on both the company's environmental performance and the broader goal of developing commercial fusion energy solutions.

Lead environmental compliance and sustainability initiatives for a fusion energy company, managing complex projects and regulatory requirements.

Principal Environmental Engineer

Commonwealth Fusion Systems (CFS) is at the forefront of fusion energy development, having raised over $2 billion in capital since 2018. The company is actively working on building SPARC, a net energy tokamak in Devens, MA. As a Materials Test Engineer, you'll join a dynamic team focused on testing and qualifying materials for extreme fusion energy environments. The role combines hands-on mechanical testing experience with engineering fundamentals, particularly focusing on materials performance at cryogenic temperatures. You'll work across multiple teams, from design engineering to supply chain, contributing to groundbreaking fusion energy technology. The position offers competitive compensation ($80,000-$180,000), comprehensive benefits, and the opportunity to be part of a mission-driven company that values diversity and innovation. CFS provides a fast-paced environment where you'll tackle challenging problems while working with cutting-edge technology in the clean energy sector. The company maintains a strong commitment to safety and professional growth, making it an ideal place for engineers passionate about making a significant impact in the energy industry.

Materials Test Engineer role at Commonwealth Fusion Systems, focusing on testing and qualifying materials for fusion energy systems with competitive compensation and benefits.

Materials Test Engineer

Commonwealth Fusion Systems (CFS) is at the forefront of fusion energy development, backed by over $2 billion in capital since 2018. As a Senior Electrical Engineer, you'll join a mission-critical team working on SPARC, reporting to the Director of Power Systems. This role combines complex technical leadership with hands-on engineering work in fusion power systems.

You'll lead the design and implementation of medium and low voltage electrical systems for fusion power, developing comprehensive electrical systems including distribution networks, protection systems, and utility connections. The position requires expertise in complex engineering calculations, industry standards compliance, and project management.

The ideal candidate brings 8+ years of experience, a PE license, and proven experience in large-scale power utility design. You'll work in an innovative environment with cutting-edge technology, alongside talented professionals dedicated to revolutionizing the energy sector.

CFS offers a competitive compensation package including equity, comprehensive healthcare benefits, and strong work-life balance policies. The company values diversity and maintains an inclusive workplace culture focused on integrity, execution, and impact. This is an opportunity to be part of a transformative mission to deliver sustainable fusion energy solutions for the future.

Senior Electrical Engineer position at Commonwealth Fusion Systems, leading MV/LV electrical systems design for fusion power technology.

Senior Electrical Engineer

Commonwealth Fusion Systems (CFS) is at the forefront of fusion energy development, working to revolutionize the energy industry through commercially viable fusion power plants. Since 2018, they've secured over $2 billion in funding, making them the most well-funded fusion energy company in the U.S.

The Senior Electrical Engineer - Power Supply Design role offers an exciting opportunity to work on cutting-edge fusion power technology. Reporting to the Director of Power Systems in the SPARC team, you'll lead complex electrical design projects focusing on high-current power supplies essential for fusion power generation.

Key responsibilities include designing IGBT/MOSFET-based power electronics systems, developing technical specifications for voltage systems, and leading critical procurement efforts. You'll work with state-of-the-art technology and equipment, applying your expertise in power electronics and magnetics to solve complex engineering challenges.

The ideal candidate brings 10+ years of power electronics experience, with proven expertise in DC/DC and AC/DC power supply design at high currents. You'll need strong technical skills, leadership abilities, and excellent communication capabilities to succeed in this fast-paced environment.

CFS offers competitive compensation ($80,000-$180,000), comprehensive benefits including equity, health insurance, and 401(k) matching, and the opportunity to be part of a mission-driven team working on world-changing technology. The role is based in the Boston area and requires on-site presence due to the hands-on nature of the work.

Join CFS to be part of a diverse, talented team working to deliver the urgent transition to fusion energy, making a lasting impact on the world's energy future.

Senior Electrical Engineer position focusing on power supply design for fusion energy systems at Commonwealth Fusion Systems.

Senior Electrical Engineer - Power Supply Design

Commonwealth Fusion Systems develops commercially viable fusion power plants, combining research, talent, and new technologies for the urgent transition to fusion energy.

Commonwealth Fusion Systems is revolutionizing the energy sector by developing commercially viable fusion power plants. Since 2018, they've secured over $2 billion in funding, making them the most well-funded fusion energy company in the US. As a Full-Stack Software Engineer, you'll join their Scientific Software team, working on critical applications that support superconducting magnet manufacturing and tokamak development. The role focuses on maintaining and expanding an internal web app that manages the world's largest HTS test dataset, built with modern TypeScript practices using React and Next.js. This position offers a unique blend of web development expertise and applied physics, requiring strong technical skills and cross-disciplinary communication. The role comes with competitive compensation ($150,000-$250,000), equity, comprehensive benefits, and the opportunity to contribute to groundbreaking clean energy technology. The ideal candidate will have production web application experience, strong TypeScript/React skills, and the ability to work in a fast-paced startup environment while maintaining high software quality standards.

Full-Stack Software Engineer role at Commonwealth Fusion Systems, developing critical web applications for fusion energy technology with TypeScript and React.

Full-Stack Software Engineer

Commonwealth Fusion Systems (CFS) is at the forefront of fusion energy development, working to revolutionize the energy industry through commercially viable fusion power plants. Since 2018, they've secured over $2 billion in funding, making them the most well-funded fusion energy company in the US. They're seeking an Associate R&D Test Engineer to join their mission-driven team in Devens, MA.

The role combines hands-on technical work with strategic thinking, focusing on testing and risk management for CFS's HTS magnets. You'll be responsible for designing, building, and operating test equipment, while working across multiple teams including manufacturing, R&D, and procurement. The position offers a unique opportunity to work with cutting-edge technology in fusion energy, including cryogenics, high-field magnets, and advanced instrumentation.

The ideal candidate will bring a fresh perspective to complex engineering challenges, with a background in electrical, mechanical, or physics engineering. You'll be part of a fast-paced environment where innovation and critical thinking are valued. The role offers competitive compensation ($75,000-$150,000), comprehensive benefits including equity, and the chance to contribute to a technology that could transform global energy production.

CFS values diversity and maintains an inclusive work environment, making it an excellent opportunity for those passionate about clean energy and technological innovation. The position combines technical expertise with collaborative teamwork, offering significant growth potential in a rapidly expanding field.

Entry-level R&D Test Engineer position at Commonwealth Fusion Systems, working on fusion energy technology with competitive salary and benefits.

Associate R&D Test Engineer

Commonwealth Fusion Systems (CFS) is at the forefront of fusion energy development, having raised over $2 billion in capital since 2018. The company is seeking a Diagnostic Mechanical Engineer to join their SPARC Tokamak Team, working on cutting-edge fusion energy technology. The role involves designing and implementing sophisticated diagnostic systems for the SPARC facility, which comprises over forty sub-systems using various techniques to measure and control plasma behavior.

The position offers a unique opportunity to work with advanced technologies in fusion energy, collaborating with CFS staff, MIT-PSFC partners, and international fusion community collaborators. The engineer will be responsible for designing components, supporting diagnostic systems, and contributing to the development of tools that will help achieve net energy from a tokamak for the first time.

Key responsibilities include designing large structures for diagnostic equipment, developing assembly procedures, and working on radiation shielding solutions. The ideal candidate will have a strong engineering background, experience in structural design, and the ability to work in a fast-paced environment. The role offers competitive compensation ($80,000-$180,000), comprehensive benefits, and the chance to be part of a mission-driven team working on transformative energy technology.

CFS values diversity and maintains an inclusive work environment, considering all qualified applicants equally regardless of background. The position offers professional growth opportunities, team-building activities, and the chance to contribute to groundbreaking advancements in fusion energy technology.

Join Commonwealth Fusion Systems as a Diagnostic Mechanical Engineer, designing and implementing sophisticated diagnostic systems for the SPARC Tokamak facility.

Diagnostic Mechanical Engineer

Commonwealth Fusion Systems is at the forefront of fusion energy development, backed by over $2 billion in capital since 2018. As a Senior Mechanical Engineer for the SPARC superconducting magnets feeder team, you'll be instrumental in developing cutting-edge technology for commercially viable fusion power plants. The role combines hands-on engineering with strategic oversight, requiring expertise in thermal, structural, and electromagnetic analysis.

You'll own hardware development from concept to delivery, working with advanced systems involving high power, mass, and force components. The position offers a unique opportunity to contribute to groundbreaking energy technology while working with interdisciplinary teams of experts. You'll be responsible for critical hardware systems, performing complex analyses, and ensuring successful manufacturing and installation.

The company culture emphasizes integrity, execution, impact, and self-critique, making it ideal for motivated professionals who thrive in fast-paced environments. With competitive compensation including equity, comprehensive benefits, and professional growth opportunities, this role offers both technical challenges and career advancement. The hybrid work environment provides flexibility while maintaining collaborative opportunities with industry-leading experts in fusion energy technology.

This position is perfect for experienced engineers passionate about clean energy solutions and ready to tackle complex technical challenges. You'll be part of a mission-driven team working to revolutionize the energy industry through fusion power, with the backing of significant investment and industry support.

Senior Mechanical Engineer role at Commonwealth Fusion Systems, developing cutting-edge fusion energy technology with competitive compensation and benefits.

Senior Mechanical Engineer - HTS Magnet Feeder System

Commonwealth Fusion Systems is at the forefront of fusion energy development, working to deliver a sustainable energy future. As a Senior Mechanical Engineer for the SPARC superconducting magnets feeder team (FEED), you'll play a crucial role in developing and implementing cutting-edge technology. The position involves owning hardware from concept to delivery, performing complex analyses, and working with various teams to ensure successful implementation.

The role combines hands-on engineering with strategic thinking, requiring expertise in thermal, structural, and electromagnetic analysis. You'll be responsible for developing design notes, technical specifications, and assembly procedures while supporting procurement efforts. This position offers the opportunity to work on groundbreaking technology that could revolutionize energy production.

The ideal candidate brings substantial engineering experience, particularly in designing and supporting production hardware. You'll need strong analytical skills, practical experience with high-power mechanical systems, and the ability to work independently while collaborating with cross-functional teams. The position offers the chance to work with cutting-edge technology in fusion energy, contributing to a mission-driven company that values diversity and innovation.

Working at Commonwealth Fusion Systems means joining a team that has raised over $2 billion in capital and is leading the charge in fusion energy development. The company offers a fast-paced, values-driven environment where integrity, execution, impact, and self-critique are paramount. This role provides an opportunity to be part of a transformative technology that could reshape the future of energy production.

Senior Mechanical Engineer position at Commonwealth Fusion Systems, focusing on HTS Magnet Feeder System development for fusion energy technology.

Commonwealth Fusion Systems (CFS) is at the forefront of fusion energy development, working to revolutionize the energy industry through commercially viable fusion power plants. Since 2018, they've secured over $2 billion in funding, making them the most well-funded fusion energy company in the U.S.

The company is seeking an R&D HTS Test Engineer to join their team in Devens, MA, working on the SPARC net energy tokamak and future ARC tokamaks. This role is crucial in the development of compact high field magnet technology, which is essential for fusion energy systems. The position involves working with high temperature superconducting materials under extreme conditions, including high magnetic fields, neutron fluxes, and mechanical loads.

The ideal candidate will be responsible for managing a superconducting magnet system and conducting critical HTS characterization studies. This role offers the opportunity to work at the cutting edge of fusion energy technology, collaborating with multiple stakeholders across manufacturing, engineering, design, and R&D teams.

The position requires a strong background in physics or engineering, with specific experience in superconductor testing and cryogenic systems. The successful candidate will combine technical expertise with excellent communication skills and the ability to work in a fast-paced environment. This is an exciting opportunity to contribute to the urgent transition to fusion energy and be part of a team that's building the energy industry of the future.

CFS values diversity and maintains an inclusive work environment, considering all qualified applicants equally regardless of background. The company culture emphasizes integrity, execution, impact, and self-critique, making it an ideal place for mission-driven individuals who want to make a significant impact on the future of energy technology.

R&D HTS Test Engineer position at Commonwealth Fusion Systems, focusing on superconducting magnet systems and fusion energy development.

R&D HTS Test Engineer

Commonwealth Fusion Systems (CFS) is at the forefront of the urgent transition to fusion energy, combining decades of research with cutting-edge technologies to develop commercially viable fusion power plants. Since 2018, CFS has secured over $2 billion in capital, making it the most well-funded fusion energy company in the U.S.

As a Manufacturing Engineer - NPI at CFS, you'll be instrumental in bridging the gap between product development and full-scale production. Working on a weekend shift (6:00 am - 6:00 pm), you'll collaborate with cross-functional teams to ensure smooth product transitions from R&D to manufacturing. The role demands expertise in manufacturing processes, Lean methodologies, and hands-on problem-solving.

Your responsibilities will span from developing manufacturing processes and conducting DFM/DFA analysis to creating comprehensive documentation and training production personnel. You'll work with state-of-the-art technology in fusion energy, including magnets, thermo-mechanical assemblies, and vacuum systems.

The ideal candidate brings 5+ years of manufacturing engineering experience, strong analytical skills, and the ability to thrive in a fast-paced environment. You'll be joining a company that values integrity, execution, impact, and self-critique, working alongside mission-driven professionals who are passionate about revolutionizing the energy industry.

CFS offers a unique opportunity to be part of the clean energy revolution, working with cutting-edge technology while contributing to a sustainable future. The company maintains a strong commitment to diversity and inclusion, welcoming perspectives from all backgrounds to tackle complex challenges in fusion energy development.

Manufacturing Engineer role at Commonwealth Fusion Systems, focusing on transitioning new products from development to production in fusion energy technology.

Manufacturing Engineer - NPI - Weekend Shift

Commonwealth Fusion Systems is at the forefront of fusion energy development, working to revolutionize the energy industry through commercially viable fusion power plants. Since 2018, they've secured over $2 billion in funding, making them the most well-funded fusion energy company in the U.S. They're seeking a R&D Test Engineer to join their mission-critical team, focusing on testing and risk mitigation for HTS magnets.

The role demands a unique blend of mechanical, electrical, materials, fluids, and software engineering expertise. You'll be responsible for designing, building, and commissioning test equipment while working collaboratively across multiple teams. The position emphasizes mechanical design and construction of test equipment, requiring hands-on experience with cryogenic, vacuum, and high-current conditions.

As a Test Engineer, you'll develop comprehensive test plans, operate sophisticated equipment, and maintain crucial documentation. The role involves significant responsibility in safety management, anomaly investigation, and system scalability planning. You'll work with cutting-edge technology in fusion energy, contributing to groundbreaking developments in sustainable power generation.

The ideal candidate brings 5+ years of relevant experience, strong problem-solving abilities, and excellent communication skills. This role offers the opportunity to work with world-class scientists and engineers, making a direct impact on the future of clean energy. The position requires occasional travel and flexibility with working hours, reflecting the dynamic nature of breakthrough technology development.

Senior R&D Test Engineer position at Commonwealth Fusion Systems, focusing on HTS magnet testing and development for fusion energy technology.

R&D Test Engineer - Operations

Commonwealth Fusion Systems develops commercially viable fusion power plants, combining research, talent, and new technologies to enable the transition to fusion energy.

Commonwealth Fusion Systems (CFS) is at the forefront of developing commercially viable fusion power plants, having raised over $2 billion in capital since 2018. They're seeking a Senior Scientific Software Engineer to join their Scientific Software team, focusing on developing software for superconducting magnets and tokamaks.

The role primarily involves developing a fiber optic quench detection system - a critical safety component that detects thermal runaway events in superconducting magnets. You'll work with Python-based fiber models to simulate quench signals and develop detection algorithms. The position combines sophisticated physics-based modeling with practical software engineering challenges.

As a Senior Scientific Software Engineer, you'll be responsible for analyzing experimental data, validating models, and developing real-time detection algorithms. The role requires a unique blend of software engineering expertise and physics understanding, particularly in electromagnetics and optics.

The ideal candidate should be proficient in Python, with experience in scientific computing libraries like pandas, numpy, and matplotlib. You'll need to understand numerical methods, linear algebra, and differential equations, while being capable of setting up comprehensive software development environments including CI/CD pipelines.

CFS offers a fast-paced, mission-driven environment focused on making fusion energy a reality. They value diversity and maintain an inclusive workplace culture, considering all qualified applicants equally regardless of background. This role provides an opportunity to work at the intersection of cutting-edge physics and software engineering, contributing to the future of clean energy.

Senior Scientific Software Engineer role at Commonwealth Fusion Systems, developing quench detection systems for fusion power plants using Python and physics-based modeling.

Commonwealth Fusion Systems Engineering Jobs

Commonwealth Fusion Systems is developing commercially viable fusion power plants, having raised over $2 billion in capital since 2018.