Controls Software Engineer

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. Since 2018, we’ve raised over $2 billion in capital – more than any other fusion energy company in the U.S. 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 Controls Software Engineer As a Controls Engineer, you will be responsible for developing machine and operational concepts in collaboration with R&D staff and engineering peers. You will create a robust system architecture to support all controls components such as PLCs, safety devices, HMIs, servo drives, and more. For each project, you will work from initial design all the way through commissioning, operational fine-tuning, and validation to ensure that all systems function reliably and meet their design goals. Additionally, you will work closely with cross-functional teams throughout the entire life cycle of the equipment and its operation. What you'll do: Work closely with R&D team to outline interfaces and requirements for equipment and software operation for equipment control. Participate in initial equipment conceptual development and balance product specifications, operational control requirements, layout complexity, cost, quality, and lead time limits. Write and debug PLC structured text with an emphasis on generating code that is organized, structured, documented, maintainable, and reusable. Implement (ANSI/RIA15.06/OSHA compliant) control reliable safety systems for safeguarding industrial equipment. Design, modify, and approve electrical schematics for industrial and test equipment (compliant with NFPA79/NEC/UL508A standards). Generate aesthetically simple HMI screens for complex machinery while providing sufficient feedback for troubleshooting. Create machine interactions with plant-wide SCADA to communicate product acceptability, machine status, and operational variables. Debug and optimize automated operations to maximize cycle time, improve availability, and yield. Work with external software contractors to develop the control systems for internal tools (Define requirements, manage priorities, drive testing and implementation plans). What we’re looking for: A bachelor’s degree in a relevant engineering field (e.g., EE, mechatronics, software). 5+ years of experience as a controls engineer on complex mechanical systems. PLC programming experience in IEC 611:31-3 languages. Familiar with modern tools like GitHub and CI/CD release management. HMI design, implementation, and maintenance utilizing Inductive Automation’s Ignition platform. Experience with fieldbus systems such as EtherCAT. Experience developing and tuning control loops. Experience with enclosure design compliant with NFPA79/NEC/UL508A standards. Experience with power distribution and controls. Experience with cable and harness design using AutoCAD Electrical. Experience with specification generation and supplier engagement. High self-motivation and drive to execute quickly with excellent troubleshooting and problem-solving skills. Design for manufacturability, serviceability, and simplicity over complexity. Knowledge of interlock systems and methods that conform to NFPA 79. Familiarity with applying ISO, NFPA, UL and other standards to design solutions. Bonus points for: Experience in Beckhoff and Siemens controls platforms. Must-have Requirements: Ability to occasionally lift up to 50 lbs. Perform activities such as stooping, climbing, 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, and cryogenics. Willingness to travel or work required nights/weekends/on-call occasionally. $80,000 - $180,000 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 the minimum and maximum target for new hire salaries for the position across all US locations. #LI-Onsite At CFS, we excel in fast-paced environments, driven by our values of integrity, execution, impact, and self-critique. 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.

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