Nuclear Criticality Safety (NCS) Engineer

About the Company General Matter is enriching uranium in America. Our goal is to design, build, and operate the world’s lowest-cost enrichment services in the United States. Our mission is to restore America’s ability to produce nuclear fuel—fuel that will power AI, advanced manufacturing, critical industries, and the next generation of nuclear reactors. Ultimately, our work will help power national ambitions and enable a high-energy society. We were incubated by Founders Fund, like Anduril and Palantir before us, and are backed by top-tier investors. Our lean, world-class team of engineers and operators is applying a first-principles approach to solving the problem of nuclear fuel production. We are a mission-driven company with a culture of urgency, accountability, and transparency. Help us build a high-energy society by making the cleanest, safest form of baseload energy the most affordable. About This Role We are seeking a skilled Nuclear Criticality Safety Engineer to join our team and play a critical role in ensuring the safe and effective handling of nuclear materials. You will be part of the team responsible for developing, implementing, and maintaining a criticality safety program to ensure compliance with regulatory requirements and industry standards. You will conduct evaluations, perform risk assessments, and provide technical expertise to support safe operations within a nuclear fuel cycle facility. Responsibilities Develop and maintain nuclear criticality safety evaluations (CSEs) for processes involving fissile materials. Perform criticality safety analyses, utilizing computational methods and tools (e.g., SCALE, MCNP) to assess system safety and compliance. Ensure compliance with NRC, DOE, and ANSI/ANS criticality safety standards and regulations. Conduct audits, inspections, and reviews of facility operations to identify and mitigate criticality safety risks. Collaborate with engineering, operations, and regulatory teams to implement effective safety measures. Provide technical guidance and training to personnel on criticality safety principles and procedures. Investigate criticality safety incidents and develop corrective actions as necessary. Maintain accurate documentation and records to support audits and regulatory reviews. Basic Qualifications Strong understanding of engineering fundamentals. Ability to perform trade studies and make clear recommendations using first principles and engineering fundamentals even with partial information. Bachelor’s degree in Nuclear Engineering, Physics, or a related field. Strong knowledge of criticality safety regulations, standards, and methodologies (e.g., 10 CFR Part 70, ANSI/ANS-8 series). Proficiency in computational tools such as SCALE, MCNP, or similar software. Excellent analytical and problem-solving skills. Strong verbal and written communication skills, with the ability to convey technical information to diverse audiences. Ability to work collaboratively in a team-oriented environment. Preferred Skills and Experience Evidence of exceptional ability (prior projects, portfolio of work, completed products, etc). Experience in a fast-paced engineering environment or a highly technical role requiring a resourceful, entrepreneurial approach to complete tasks within tight timeframes or budget constraints. Certification as a Nuclear Criticality Safety Engineer (e.g., ANSI/ANS-8.24). Advanced degrees. Professional Engineer (PE) license is preferred or the ability to obtain one. Additional Requirements Ability to work extended hours and weekends as necessary. Equal Opportunity Employer General Matter is an Equal Opportunity Employer; employment with General Matter is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status. Compensation and Benefits The base salary range for this role is $80,000-$170,000 annually. Compensation bands are determined by role, level, location, and alignment with market data. Individual level and base pay is determined on a case-by-case basis and may vary based on job-related skills, education, experience, technical capabilities and internal equity. Please note that the stated salary range is an estimate and may be adjusted based on market conditions, business needs, or other factors. In addition to base salary, for full-time hires, you may also be eligible for long-term incentives, in the form of stock options, and access to medical, vision & dental coverage as well as access to a 401(k) retirement plan.

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