Fluid Systems Engineer

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.

We are seeking a Fluid Systems Engineer to lead the design, analysis, and deployment of fluid systems for our uranium enrichment facility. This role is responsible for developing highly reliable, manufacturable systems that move, store, and control fluids critical to enrichment operations. You will own systems from early sizing and architecture through detailed mechanical design, testing, and production ramp, working closely with manufacturing, operations, and safety teams.

• Perform system‑level sizing and performance analysis for fluid systems to establish requirements and operating margins.
• Translate requirements into hardware concepts, evaluating architectures and design trades for performance, safety, and manufacturability.
• Design pressurized and unpressurized components and assemblies, producing original CAD models, drawings, and specifications.
• Conduct structural and mechanical analysis to ensure survivability under pressure, thermal, and operational loads.
• Drive design‑for‑manufacturability improvements to enable efficient, repeatable production.
• Lead first‑article builds and work directly with manufacturing teams to establish robust production processes.
• Plan and execute development, qualification, and acceptance testing for critical hardware.
• Define concepts of operations for systems, from commissioning and acceptance testing through steady‑state operation.
• Participate in internal and external design reviews with cross‑functional partners, suppliers, and stakeholders.

• Bachelor’s degree (or higher) in Mechanical Engineering, Aerospace Engineering, Chemical Engineering, Engineering Physics, or a related field.
• +4 years of experience in Fluids System design, analysis or hardware development

• Experience with gas dynamics, thermal analysis, and finite element analysis (FEA).
• Hands‑on experience but not limited to pressurized systems (e.g., valves, regulators, piping, tubing, pressure vessels).
• Experience owning operation‑critical hardware from concept through production.
• Proficiency with FEA tools and CAD software
• Comfortable working across disciplines with manufacturing, safety, and operations teams.
• Strong communication, organization, and technical leadership skills.

• Ability to work extended hours and weekends as necessary.

This position requires eligibility to obtain and maintain a U.S. Q security clearance. This includes, but is not limited to, the following requirements:

• Successful completion of an extensive background investigation
• Drug testing
• Security interview
• Favorable adjudication of trustworthiness and reliability

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.

The base salary range for this role is $100,000–$175,000 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.