---
title: 'Senior Mechanical Engineer at Valar Atomics'
canonical: 'https://feeny.ai/job/senior-mechanical-engineer-valar-atomics-torrance-tg3we223525c'
type: 'job'
last_seen: '2026-10-16'
---

# Senior Mechanical Engineer at Valar Atomics

- **Company:** Valar Atomics
- **Location:** Torrance, CA
- **Compensation:** $140k–$180k
- **Posted:** 2026-10-12
- **Last confirmed live:** 2026-10-16
- **Apply:** https://job-boards.greenhouse.io/valaratomics/jobs/4449178009

## 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

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

We're seeking a highly skilled Senior Mechanical Design Engineer to join our engineering team and accelerate the frontier of advanced power generation. In this role, you'll be responsible for designing, developing, and validating mechanical systems and components that meet performance, manufacturability, and cost requirements. You'll work closely with cross-functional teams to bring innovative products from concept to production, and serve as a technical leader and mentor for less experienced engineers.

## Key Responsibilities

- Lead mechanical design efforts for major subsystems, ensuring alignment between performance targets, manufacturability, and cost.
- Mentor junior engineers and review mechanical designs to ensure consistency with company standards and engineering rigor.
- Develop detailed 3D CAD models, assemblies, and engineering drawings (SolidWorks, Creo, or NX), applying advanced GD&T and tolerance analysis.
- Perform structural, thermal, or fluid analyses (FEA and CFD) to validate system performance and reliability.
- Oversee prototype fabrication, assembly, and testing, and interpret results to refine designs and improve system performance.
- Partner with electrical, manufacturing, and systems engineers to drive integration and design optimization.
- Work closely with vendors to manage DFM feedback, manufacturing process selection, and quality control.
- Contribute to internal best practices for mechanical design, documentation, and configuration management.

You Will Be Successful in This Role If

- You take true ownership of major subsystems, balancing performance, manufacturability, and cost in every design decision.
- You bring strong technical judgment to design trade-offs and know when to dig deeper versus when to keep moving.
- You apply analysis (FEA, CFD, hand calculations) appropriately, treating it as a tool for design decisions rather than a deliverable.
- You partner effectively with manufacturing and supplier teams, designing for what can actually be built and inspected.
- You mentor and develop other engineers, raising the technical capability of the team over time.
- You communicate and document clearly, leaving designs and design intent that other engineers can build on.
- You approach problems with a root-cause mindset, treating failures as opportunities to understand the system better.

## Basic Qualifications

- Bachelor's degree in Mechanical Engineering or a related field.
- 5+ years of experience in mechanical design and product development.
- Proven track record of designing and delivering production-ready hardware.
- Expertise in CAD (SolidWorks, Creo, NX, or similar) and mechanical drafting standards.
- Strong knowledge of materials, manufacturing processes, and mechanical systems.
- Experience performing or overseeing FEA and CFD analyses.
- Excellent communication, technical documentation, and leadership skills.

## Preferred Skills and Experience

- Master's degree in Mechanical Engineering or a related field.
- Experience in high-performance or safety-critical systems (aerospace, energy, or defense).
- Deep understanding of DFM/DFA and reliability engineering.
- Familiarity with PLM/PDM tools and design control processes.
- Hands-on prototyping, testing, and validation experience.
- Strong analytical mindset with the ability to lead root cause investigations.

## 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

## About Valar Atomics

## Company Overview
- **One-liner**: Valar Atomics is scaling nuclear energy through grid-independent, high-temperature gas reactors (HTGR) for hydrogen production, data center power, heavy industrial power, and clean hydrocarbon fuel synthesis.
- **Entity Type**: Private (total funding $494M–$600.5M, latest round Debt - II)
- **Headquarters**: El Segundo, California, United States (additional location in Orangeville, Utah)
- **Founded**: 2023
- **Founders**: Not publicly listed (key executives include President Muhammad Shahzad and CNO Mark Mitchell)

## Core Business
- **Primary industry**: Nuclear energy / advanced nuclear reactor technology
- **Target customers**: Large-scale industrial users (hydrogen producers, data centers, heavy industry), grid-independent operations, and fuel synthesis plants (B2B, Enterprise)
- **Mission or purpose**: “Nuclear needs scale” – unlock economies of scale by building hundreds of reactors on Valar gigasites, divorcing industrial power from the traditional grid.

## Products & Services
- **[Ward 250 Reactor]**: A grid-independent HTGR using TRISO fuel, designed for high-volume, non-bespoke production. Achieved criticality in June 2026 under DOE’s pilot program. Product type: Hardware (nuclear reactor).
- **[Hydrogen Production]**: Reactors paired with a sulfur-iodine cycle process to produce cheap, abundant hydrogen. Product type: Industrial energy product.
- **[Data Center Power]**: Dedicated on-site nuclear power for AI data centers, targeting AI’s projected 200+ TWh additional demand by 2030. Product type: Service / infrastructure.
- **[Heavy Industrial Power]**: Grid-independent power for processes like green steel and bauxite electrolysis. Product type: Service / infrastructure.
- **[Clean Hydrocarbon Fuels]**: Combines cheap hydrogen with captured CO₂ via a modified Fischer-Tropsch process to create synthetic fuels. Product type: Fuel product.
- **[Modular Citadel Shielding]**: Pre-cast, self-tensioning shielding system for mass-manufactured reactor protection. Production line capable of 1,000+ blocks per year. Product type: Hardware component.

## Market Standing
- **Valuation / Market Cap**: Not disclosed (CB Insights shows valuation as hidden)
- **Key Metric**: Total funding reported as $494M (LinkedIn) or $600.5M (CB Insights, conflicting reports); latest round debt financing in November 2025.
- **Notable Investors**: Palmer Luckey, Shyam Sankar, Day One Ventures, DTX Ventures, Contrary, Riot Ventures (led Seed), Snowpoint Ventures (led Series A), and 28+ others.
- **Growth Signals**: Headcount of 74 employees (+232% YoY, +9.6% monthly); 30 active job postings; Ward 250 reactor achieved criticality in June 2026; partnerships with DOE, San Rafael Energy Research Center, and State of Utah; opened first nuclear site (San Rafael) in February 2026.

## Competitive Advantages
- **Proven HTGR design** with unmatched safety profile and proliferation resistance when paired with TRISO fuel.
- **Grid-independent “gigasite” model** that avoids traditional grid constraints, enabling mass manufacturing of standardized reactors.
- **Vertical integration**: In-house design of reactors, fuel processing (sulfur-iodine cycle), and shielding systems (Modular Citadel).
- **Speed to market**: Ward 250 is on track for power operations before July 4, 2026, under a DOE mandate.
- **Talent base**: Attracts engineers from Ultra Safe Nuclear, X-energy, Anduril, and other advanced hardware companies.

## Strategic Focus
- **Scale manufacturing**: Transition from project-based nuclear to high-volume production through gigasites.
- **Achieve operational milestones**: Achieve hot criticality and power operation at Ward 250 by mid-2026.
- **Expand product lines**: Deliver grid-independent hydrogen, data center power, and synthetic fuels to meet industrial and AI energy demands.
- **Grow headcount rapidly**: Aggressively hiring in engineering, operations, quality, and technical roles.

## Why Work Here
- **Mission-driven culture**: “Hardware is the only thing that counts” – emphasis on building real reactors, not just pitching.
- **High growth environment**: Company doubled headcount in the past year; roles offer significant ownership and impact.
- **Locations**: Hawthorne (CA), El Segundo (CA), Orangeville (UT), and Huntington (UT) – roles span design, manufacturing, and field operations.
- **Work style**: Likely on-site/hybrid for technical roles (e.g., Build Engineer, Nuclear Operations Manager, Machinist).
- **Perks & culture**: Rapid advancement opportunities, exposure to cutting-edge nuclear and chemical engineering, and a team with deep ties to defense and deep-tech.
- **Current openings**: 30+ roles including mechanical engineers, plant operators, quality engineers, finance systems engineers, and technical recruiters.

## Sources
1. [valaratomics.com](https://valaratomics.com/)
2. [Greenhouse careers](http://job-boards.greenhouse.io/valaratomics)
3. [CB Insights](https://www.cbinsights.com/company/valar-atomics)
4. [LinkedIn](https://www.linkedin.com/company/valar-atomics)

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