About the Company

Humanity faces two critical challenges: securing reliable energy for everyone and aggressively lowering our environmental impact. Our client believes nuclear fission is the key to solving both at once. Today they are actively developing the technology to rapidly scale the deployment of nuclear fission.

The Opportunity

As a fluids engineer, you’ll be responsible for designing hardware to manage the complex network of fluids, piping, and plumbing required to operate a nuclear reactor. Fluids engineers will be responsible for designing tightly packaged fluid systems optimized for low cost, ease of manufacturability, and ultra-high reliability in a nuclear environment with challenging access.

Sr. Fluids Engineers will own the most complex fluid systems while setting the technical bar for the fluids engineering team. Successful candidates will have previously demonstrated extreme ownership in designing, testing and delivering complex and high reliability fluid systems.

Responsibilities

- Design, build and deploy fluid systems to support rapid reactor build and test timelines
- Perform detailed fluids analysis to characterize and troubleshoot expected design performance
- Work closely with our in-house build shop to develop and own the scaling of the manufacturing line for your system
- Support critical reactor test campaigns & operations, provide troubleshooting and technical support
- Develop and maintain detailed timelines to capture and communicate project progress
- Make high-value decisions on the fly, use feedback to continuously iterate and develop both product and process
- Provide training and mentorship to junior fluids engineers, setting the standard for technical rigor across the team

Basic Qualifications

- Bachelor’s degree in mechanical engineering or a related technical discipline
- 5 years of engineering experience designing, analyzing,



and building mechanical hardware

Preferred Skills and Experience

- Strong interpersonal and collaborative skills, enthusiasm for problem solving, and desire to enable abundant clean energy
- 5 years of experience designing and analyzing fluid systems via professional work experience, project/research-based student experience, or a combination of both
- Experience acting as a technical lead — scoping work, reviewing designs and processes, and guiding other engineers to successful outcomes
- Ability to perform trade studies and make clear recommendations using first principles and engineering fundamentals even with partial information
- Experience working at a nimble engineering organization or in a highly technical position that required a scrappy, entrepreneurial manner to accomplish tasks with tight time or budget constraints
- Hands‑on experience with fluid, gas, or thermal systems
- Experience using test instrumentation and control components (e.g. pressure transducers, thermocouples, resistance temperature detectors, relays, solenoid valves, etc.)
- Experience designing highly integrated and complex fluid systems in high reliability environments

Additional Requirements

- The position will be based in the Los Angeles Metro The position will be full-time in the office.
- Ability to work extended hours and weekends as necessary
- Ability to travel to reactor construction sites in other states as necessary

Compensation and Benefits

- Competitive Base Compensation – DOE
- Long-term incentives, in the form of company stock or stock options, as well as potential discretionary bonuses and the ability to purchase additional stock at a discount through an Employee Stock Purchase Plan
- Access to comprehensive medical, vision, and dental coverage, access to a 401(k) retirement plan, paid vacation, paid parental leave, and various other perks.

#J-18808-Ljbffr

📌 Senior Mechanical Engineer, Fluids (Pereira)
🏢 Adastra
📍 Pereira