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Inside Sales Engineer
Florida Systems Group LLC
Remote, United States
We are a collective of HVAC design and implementation experts. As recognized industry leaders, we combine our craft with care for spaces that matter most: healthcare, commercial,…
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Manufacturing Engineer
CRISTEK INTERCONNECTS INC
Minden, NV
- $72,800 to $85,200 USD / year
…defense designs into safe, reliable products. As a Manufacturing Engineer I, you’ll work alongside engineering, production, and quality teams to support day-to-day manufacturing and improve…
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Software Engineer
PayPal, Inc.
Scottsdale, AZ
- $135,304 to $171,500 USD / year
…payouts. We also help merchants connect with their customers, process exchanges and returns, and manage risk. We enable consumers to engage in cross-border shopping and merchants to extend…
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Module Development Engineer
Intel Corporation
OR
- $133,800 to $188,890 USD / year
Apply statistical process control (SPC), design of experiments (DOE), and engineering analysis techniques to evaluate process performance and support technology development.
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Process Integration, Yield, Defect Reduction Engineering Lead
Intel Corporation
NM · OR
- $120,860 to $231,670 USD / year
As a Process Integration and Yield Engineer, you will play a pivotal role in driving technology improvement and manufacturing excellence. You will define process integration roadmaps,…
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Senior Software Engineer, Omni
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Redwood City, CA
We are looking for a strong backend engineer to help us build and scale these critical distributed systems. This is your opportunity to solve fascinating problems at the intersection of…
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Solutions Architect
Syms Strategic Group, LLC (SSG)
Columbus, GA
- $109,623 to $126,790 USD / year
Work closely with the Enterprise Architect to design, implement, and govern secure, scalable, and highly available Azure cloud architectures, ensuring alignment with enterprise technology…
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Solutions Architect
Syms Strategic Group, LLC (SSG)
Dunwoody, GA
- $109,623 to $126,790 USD / year
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Solutions Architect
Syms Strategic Group, LLC (SSG)
Marietta, GA
- $109,623 to $126,790 USD / year
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Solutions Architect
Syms Strategic Group, LLC (SSG)
Savannah, GA
- $109,623 to $126,790 USD / year
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Solutions Architect
Syms Strategic Group, LLC (SSG)
Warner Robins, GA
- $109,623 to $126,790 USD / year
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Solutions Architect
Syms Strategic Group, LLC (SSG)
Boise, ID
- $109,623 to $126,790 USD / year
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Solutions Architect
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Ames, IA
- $109,623 to $126,790 USD / year
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Solutions Architect
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Cedar Rapids, IA
- $109,623 to $126,790 USD / year
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Solutions Architect
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Davenport, IA
- $109,623 to $126,790 USD / year
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Solutions Architect
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Des Moines, IA
- $109,623 to $126,790 USD / year
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Solutions Architect
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Iowa City, IA
- $109,623 to $126,790 USD / year
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Solutions Architect
Syms Strategic Group, LLC (SSG)
Clarksville, IN
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Solutions Architect
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Fort Wayne, IN
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Solutions Architect
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Indianapolis, IN
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Solutions Architect
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South Bend, IN
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Solutions Architect
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Process/Specialty Engineer IV
Fluor Careers
Aliso Viejo, CA
The Process/Specialty Engineer IV provides engineering and technical support for potential upcoming moderate to complex projects, including:

Valar Atomics

Senior Process Engineer, Numenor (Reactor)

Torrance, CA, United States

$140,000 - $180,000 USD

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Job details

Pay: $140,000 - $180,000 USD
Posting language: English
Posted: Nov 9, 2026

Original job description

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.

The Team

The Numenor team is building Valar’s next reactor, the flagship program that will define how we deliver nuclear power at scale. This dedicated team owns the entire plant, from the reactor core and helium systems to cooling, plant modules, and the Citadel, uniting mechanical, systems, safety, IC&E, quality, and supply chain under one mission. The work starts with bringing the first unit to life and ends with a production line that delivers reactors faster with every build. What this team builds will power the critical infrastructure of the future.

The Role

Valar Atomics seeks a Senior Process Engineer for the reactor program. This role will own the helium process systems that support the reactor, including helium services, purification, and the systems that interface with the primary helium loop and helium pressure boundary. You will take these systems from concept through design, build, test, and commissioning on the first unit, then help drive them into repeatable, scaled production.

The role demands someone who is hands-on and hardware-first, while bringing the rigor and discipline required to ensure the design basis is met.

Key Responsibilities

Process Design and Analysis

Own the process architecture and design of helium systems from concept through design freeze.
Perform process analyses including mass and energy balances, pressure drop, heat transfer, equipment sizing, gas flow, and transient system behavior.
Develop PFDs, P&IDs, equipment and piping specifications, engineering calculations, and operating procedures.
Specify and integrate process equipment, including pressure vessels, heat exchangers, adsorption systems, compressors, valves, piping, instrumentation, and gas analyzers.
Present designs at design reviews and participate in HAZOPs, FMEAs, and system safety analyses.

Build, Test and Commissioning

Take designs to hardware through technical requirements, vendor selection, proposal review, and approval of manufacturing documentation.
Lead fabrication oversight, inspections, issue resolution, and acceptance testing with internal manufacturing and suppliers.
Lead system integration, installation, startup, commissioning, and troubleshooting through first operation.
Design for manufacture and repeatability, so each unit builds faster than the last.

Collaboration

Work closely with mechanical, systems engineering, safety, IC&E, quality, and supply chain so the plant design stays integrated.
Mentor junior engineers and contribute to process engineering standards and best practices.

Basic Qualifications

Bachelor’s degree in Chemical Engineering, Mechanical Engineering, Nuclear Engineering, or a related field.
5+ years designing industrial process systems, gas handling systems, thermal-fluid systems, or related energy systems.
Proven track record taking complex engineered systems from concept through build, test, and commissioning.
Strong foundation in thermodynamics, fluid mechanics, and process engineering principles.
Experience developing PFDs, P&IDs, process calculations, equipment specifications, and operating procedures.
Familiarity with industrial instrumentation, process controls, and gas analysis systems.

Preferred Skills and Experience

Master’s degree in Chemical Engineering, Mechanical Engineering, Nuclear Engineering, or a related field.
Helium, cryogenic, high-pressure gas, gas purification, or vacuum systems, including sealing and leak tightness.
Familiarity with helium coolant chemistry, impurity control, moisture management, graphite compatibility, and gas sampling.
First-of-a-kind system experience in aerospace, power generation, oil and gas, chemical processing, or defense.
Working knowledge of ASME pressure vessel and piping codes (Section VIII, B31.3) and industrial gas handling standards.
Design for manufacture and scaling from prototype to series production.
Nuclear industry experience, including HTGRs or other advanced reactors: commercial, defense, or national laboratory. A plus, not a prerequisite.

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

Equal Employment Opportunity Statement

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

$140,000 - $180,000 USD

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