Materials Test Operator

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. We’re working with policymakers and suppliers to build the energy industry of the future. Since 2018, we’ve raised nearly $3 billion in capital, making us the largest and leading private fusion company in the world.

About the role

The Materials Department at CFS is looking for a materials test operator to support our mechanical testing and characterization laboratory. Materials at CFS supports the design and engineering of all components needed for fusion systems and high-temperature superconducting (HTS) magnets. Working closely with the team lead, the materials test operator provides continuous support for both industry-standard and customized mechanical testing—including tensile, compression, flexural, shear, and fatigue. This role balances rigorous mechanical data acquisition and equipment operation with essential metallographic specimen preparation and microscopy. The operator is responsible for communication with internal stakeholders, detailed data reporting, equipment maintenance, and production line support.

Laboratory capabilities include, but are not limited to: mechanical testing (Universal Testing Machines such as Instron, Load Cells, Extensometers), metallographic specimen polishing and preparation, microscopy, heat treatments, magnetic property evaluation, and other thermophysical tests.

Responsibilities

• Prepare test specimens and perform laboratory experiments
• Continuous improvement in the materials test and characterization laboratory
• Support inventory management on consumable/spare parts and report up for purchasing
• Execution of materials test Jira tickets and QBench orders in accordance with the standard operating procedures
• Operate industry standard and customized materials testing and characterization equipment, processes, and test methods
• Conduct materials testing independently under the input from a materials test engineer including data management and reporting
• Mechanical testing includes destructive testing (Tensile, Compression, Flexural, Shear, Peel, and Fatigue) using Instron Universal Testing Machines, and other custom testing in extreme environments over a range of temperatures
• Utilize instrumentation including Load Cells, Torque Wrenches, Extensometers, Strain Gauges, Calipers, and Micrometers to ensure accurate data acquisition
• Materials characterization includes metallographic sample preparation (cutting, grinding, polishing), microscopy, hardness testing, magnetic and electrical testing
• Support in installing, maintaining, and troubleshooting laboratory equipment, including equipment calibration and alignment for effective usage
• Assemble custom fixturing and test stands to meet unique R&D requirements
• Work on multiple, different assignments and adapt to changes in lab operations, priorities, and schedules
• Maintain rigorous documentation with attention to detail, ensuring data integrity and effective troubleshooting throughout the test lifecycle
• Perform repeated tests while maintaining test quality
• Perform other related job duties as assigned by management

Requirements

• High school diploma/equivalency certificate or higher
• Minimum 2 years experience with basic materials prep and testing tools
• Minimum 2 years experience with a variety of technical support skills including but not limited to mechanical and electrical assembly, vacuum systems, cryogenic systems, soldering, and wiring
• Participate in and promote CFS’ safety procedures and policies
• Desire to work in a fast-paced R&D environment with daily changes
• Meticulous attention to detail
• Ability to work effectively in a multidisciplinary team of engineers, scientists, technical staff and others
• Ability to rapidly execute short turnaround materials testing tasks
• Strong problem solving skills, ability to approach new problems with creativity
• Strong written and oral communications skills & techniques
• Effective root cause analysis and problem-solving skills
• Proficient PC skills (Microsoft Word, Excel, PowerPoint)
• Ability to work independently and in a team environment
• Ability to comply, interpret and support procedures, work rules, and protocols

Skills

• Experience with Instron-based mechanical test systems, Bluehill and Wavematrix software is a plus
• Testing to industry or international standards (e.g. ASTM D638, ASTM E8, ISO)
• Experience working with cryogens such as Liquid Nitrogen and Liquid Helium
• Experience with strain-gage application
• Experience using electrical test devices
• Experience with metallographic sample preparation and analysis
• Experience with hazardous chemical use and management
• Experience with vacuum systems
• Experience operating shop equipment including horizontal band saws, drill presses, grinders/sanders, etc.
• Ability to follow engineering procedures and instructions
• Understands materials testing and characterization equipment operations and processes

Must-have requirements

• Ability to occasionally lift up to 50 lbs
• Perform activities such as typing, standing, or sitting 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, metallographic Etchants and cryogenics
• Willingness to travel or work required nights/weekends/on-call occasionally

Benefits

• 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

Pay

Salary range for this full-time position + equity + benefits. The actual salary will depend on level, location, qualifications, and experience. The range displayed reflects new hire salaries for the position across all US locations.