Senior Process Engineer
- Pay
- $144,000 – $176,000 per year
- Location
- Torrance, CA · On-site
- Job type
- Full-time
- Level
- Director
- Experience
- 5+ years
- Education
- Bachelor's degree
- Listed
- 30 days ago
Skills & highlights for this role
- process system design
- P&ID development
- thermodynamics
- fluid mechanics
- ASME B31.3
Also useful
- HAZOP
- FMEA
- gas purification
- cryogenic systems
Stated benefits & perks
- Health
- Unlimited pto
- Equity
The Team
As part of the Engineering organization, Mechanical Engineering designs and develops the mechanical systems, components, and equipment that power Valar's advanced nuclear technologies. The team ensures designs are robust, manufacturable, and optimized for long-term performance.
The Role
Valar Atomics is seeking an experienced Senior Process Engineer to lead the design, development, testing, and operation of helium systems supporting next-generation high-temperature gas-cooled reactor (HTGR) technology. This engineer will own process system architecture from early concept and design through manufacturing and commissioning.
Key Responsibilities
- Own the design, procurement, fabrication, assembly, and commissioning of helium process systems from concept through operation.
- Lead manufacturing execution for assigned systems, including vendor selection, fabrication oversight, inspections, issue resolution, and acceptance testing.
- Develop process system documentation including PFDs, P&IDs, equipment specifications, piping specifications, operating procedures, and engineering calculations.
- Perform process engineering analyses including mass and energy balances, pressure drop, heat transfer, equipment sizing, gas flow, and transient system behavior.
- Specify and integrate process equipment including pressure vessels, heat exchangers, adsorption systems, compressors, valves, piping, instrumentation, and gas analyzers.
- Work directly with internal manufacturing, suppliers, and contract manufacturers to resolve fabrication issues, improve manufacturability, and ensure hardware meets design intent.
- Support equipment procurement by developing technical requirements, reviewing vendor proposals, and approving manufacturing documentation.
- Lead system integration, installation, startup, commissioning, and troubleshooting of helium process systems.
Basic Qualifications
- Bachelor's degree in Chemical Engineering, Mechanical Engineering, Nuclear Engineering, or a related engineering discipline.
- 5+ years of experience designing industrial process systems, gas handling systems, thermal-fluid systems, or related energy systems.
- Proven experience developing and delivering complex engineered systems from concept through commissioning or operational deployment.
- Strong foundation in thermodynamics, fluid mechanics, and process engineering principles.
- Experience developing PFDs, P&IDs, process calculations, equipment specifications, and system operating procedures.
- Familiarity with industrial instrumentation, process controls, and gas analysis systems.
- Excellent technical communication, documentation, and cross-functional leadership skills.
Preferred Skills and Experience
- Master's degree in Chemical Engineering, Mechanical Engineering, Nuclear Engineering, or a related field.
- Experience with helium systems, cryogenic systems, high-pressure gas systems, gas purification, vacuum systems, or high-temperature process equipment.
- Experience with high-temperature gas-cooled reactors (HTGRs), advanced reactor technologies, or other nuclear energy systems.
- Familiarity with helium coolant chemistry, impurity control, moisture management, graphite compatibility, and gas sampling systems.
- Working knowledge of ASME B31.3 Process Piping, ASME Section VIII Pressure Vessels, and applicable industrial gas handling standards.
- Hands-on experience supporting commissioning, startup, troubleshooting, and performance optimization of first-of-a-kind process systems.
- Experience participating in design reviews, HAZOPs, FMEAs, and system safety analyses.
What We Offer
- Competitive base salary
- Equity ownership in a rapidly growing advanced energy company
- Comprehensive medical benefits
- Unlimited PTO
- Free daily lunch and dinner provided onsite
- Generous PPE stipend
- High-impact startup environment with significant ownership and autonomy
- Opportunities for rapid career growth and internal advancement
- Direct collaboration with experienced operators, engineers, and industry leaders
- The opportunity to help build and scale transformative energy technology from the ground up
About Valar Atomics
At Valar Atomics, we're redefining what's possible in energy. Our mission is to make clean, high-temperature nuclear power scalable-unlocking abundant energy for industry, hydrogen, and next-generation manufacturing. We are a team of builders, engineers, and operators who believe nuclear energy should be fast to deploy, factory-made, and built for the real world. Our first pilot plant in Orangeville, Utah will demonstrate how advanced nuclear systems and fuel fabrication can power the future. Joining Valar Atomics means becoming part of a company where autonomy, ownership, and impact exist at every level.
Equal opportunity and legal notices
Valar Atomics is an equal opportunity employer. We consider all qualified applicants without regard to race, color, religion, sex, gender identity, sexual orientation, national origin, age, disability, veteran status, or any other protected status under applicable law.
We are committed to providing a workplace free of discrimination and harassment and will provide reasonable accommodation as required by law.
Applicants must be legally authorized to work in the United States as a U.S. citizen or lawful permanent resident (green card holder).
Salary $144,000—$176,000 USD
From Valar Atomics's careers page, first listed on Rolev.ai on October 10, 2026. Rolev.ai is not the employer.
How Rolev.ai helps with this application
Rolev.ai is a job search and application tool for US job seekers. For this Senior Process Engineer role at Valar Atomics, it shows how your resume fits, tailors your resume to the posting, and prepares the application for you to review.
See how you fit
Openings from employer career sites are ranked against your whole resume—and searchable inside Claude, ChatGPT, and Cursor via Rolev.ai MCP.
Tailor without inventing
Every change to your resume is checked against your original. New experience goes in only with your yes—zero fabricated claims.
Draft the full kit
Tailored and Full Match resumes, role-specific cover letters, and answers to employer screening questions are prepared in seconds.
1-Click Extension Autofill
The Chrome extension fills the employer's Greenhouse, Workday, Lever, or Ashby form in 1 click. You review it and press Submit.
Similar roles
All Process Engineer jobsCommon questions
What is the salary for the Senior Process Engineer role at Valar Atomics?
The Senior Process Engineer posting at Valar Atomics states compensation of $144,000 – $176,000 per year. It is listed as a full-time position. Final pay may depend on location, experience, and interview evaluation on Valar Atomics's official career site.
Where is the Senior Process Engineer job at Valar Atomics located?
This Senior Process Engineer position at Valar Atomics is located in Torrance, CA (On-site). Always check Valar Atomics's application page for specific state eligibility or relocation policies.
What qualifications are required for Senior Process Engineer at Valar Atomics?
For the Senior Process Engineer role, Valar Atomics highlights 5+ years of relevant experience; a bachelor's degree; experience with process system design, P&ID development, thermodynamics, fluid mechanics, ASME B31.3. Rolev.ai can score your existing resume against these requirements and show any skill gaps before you apply.
How do I apply for the Senior Process Engineer position at Valar Atomics?
This listing links directly to Valar Atomics's Greenhouse application page. You can apply directly on Valar Atomics's site, or use Rolev.ai to check your resume fit, generate a zero-hallucination tailored resume and cover letter for this posting, and autofill the Greenhouse application form in 1 click with the Rolev.ai Chrome extension. You always review the form and press Submit yourself.