Full-Time

Senior Nuclear Engineer

Updated on 8/1/2026

Forge Atomics

Forge Atomics

Factory-built water-cooled nuclear reactors

Compensation Overview

$140k - $190k/yr

+ Stock or stock options + Discretionary bonuses + Employee Stock Purchase Plan

El Segundo, CA, USA

In Person

Relocation is required if not already local. Travel to reactor construction sites in other states may be required.

Category
Mechanical Engineering (1)
Requirements
  • A bachelor's degree in nuclear engineering, physics, or a related technical discipline.
  • At least 5 years of engineering experience designing, analyzing, and building complex hardware.
  • Ability to relocate to the South Bay area of Los Angeles County if not already local.
  • Ability to work extended hours and weekends as necessary.
  • Ability to travel to reactor construction sites in other states as necessary.
Responsibilities
  • Support key aspects of nuclear core design, including fuel assembly design, reactivity control through burnable poisons, chemical and mechanical shim, thermal hydraulics, and fuel cycle design.
  • Own reactivity control design and analysis, including control rod worth, shutdown margin, reactivity coefficients, chemical and mechanical shim, and transient response.
  • Perform radiation shielding and release analysis against regulatory limits.
  • Work closely with fluids, structures, components, and manufacturing teams to deliver a system-optimized and manufacturable design.
  • Maintain partnerships with fuel procurement supply chain partners, including enrichment service providers and fuel assembly fabricators, to ensure high manufacturability of the design.
  • Own a significant portion of the nuclear system through initial criticality, extended full-power operations, and fleet-wide commercial deployment.
  • Provide training and mentorship to junior nuclear engineers and set the standard for technical rigor across the team.
Desired Qualifications
  • Strong interpersonal and collaborative skills, enthusiasm for problem solving, and desire to enable abundant clean energy.
  • At least 5 years of experience designing and analyzing nuclear systems via professional work experience, project/research-based student experience, or a combination of both.
  • Experience acting as a technical lead, including scoping work, reviewing designs and analyses, and guiding other engineers to successful outcomes.
  • Ability to perform trade studies and make clear recommendations using first principles and engineering fundamentals with partial information.
  • Experience working at a nimble engineering organization or in a highly technical position requiring a scrappy, entrepreneurial approach to accomplish tasks under tight time or budget constraints.
  • Experience with nuclear system design and analysis, including core geometry, reactivity simulations, depletion analysis, and radiation shielding.
  • Experience with thermal hydraulics, heat transfer, and fluid flow regimes.
  • Experience designing to regulatory standards such as 10 CFR Part 50, Part 52, and Part 53.
  • Experience with radiation release analysis, including source term determination and dispersion analysis.

Forge Atomics designs and builds factory-built, water-cooled nuclear fission reactors to provide reliable, carbon-free baseload power. Its core product is the Ember 25 MWe reactor, with a subscale Ember Mini prototype planned before moving to full-scale deployment. The reactors are manufactured in a factory setting, using proven water-cooled reactor technology with decades of operating experience, and then shipped as modules to site where they are installed, commissioned, and operated. The company aims to lower costs and speed deployment by using mature supply chains and a mass-production approach instead of on-site, bespoke construction. Its safety approach relies on passive safety features designed to make accidents physically unlikely. The ultimate goal is to offer safe, scalable nuclear power that complements or replaces intermittent renewables, improving energy security and reducing environmental impact.

Company Size

N/A

Company Stage

N/A

Total Funding

N/A

Headquarters

N/A

Founded

N/A

Simplify Jobs

Simplify's Take

What believers are saying

  • Off-the-shelf qualified fuel assemblies reduce near-term supply-chain friction.[1]
  • SpaceX-style manufacturing experience supports repeatable, high-rate reactor production.[1]
  • Factory production aims to lower costs and accelerate customer deployments.[1]

What critics are saying

  • Aalo Atomics can reach criticality and first power before Forge.[9]
  • Applied Atomics directly copies Forge's proven-light-water and available-fuel positioning.[10]
  • Ember Mini failure would stall financing, licensing, and customer credibility.[1]

What makes Forge Atomics unique

  • Factory-built, shippable 25 MWe PWR Ember targets rapid baseload deployment.[1]
  • Uses mature water-cooled reactor technology with 60 years of operating experience.[1]
  • Ember Mini provides a non-nuclear prototype before full-scale reactor construction.[1]

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Benefits

Health Insurance

Vision Insurance

Dental Insurance

401(k) Retirement Plan

Stock Options

Employee Stock Purchase Plan

Paid Vacation

Paid Parental Leave

Paid Sick Leave