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Sr. Mechanical Engineer, Reactor Structures

Job in El Segundo, Los Angeles County, California, 90245, USA
Listing for: Forge Atomics Inc.
Full Time position
Listed on 2026-10-17
Job specializations:
  • Engineering
    Mechanical Engineer, Structural Engineer
Salary/Wage Range or Industry Benchmark: 140000 - 190000 USD Yearly USD 140000.00 190000.00 YEAR
Job Description & How to Apply Below
Sr. Mechanical Engineer, Reactor Structures

Employment Type

Full time

Location Type

On-site

Forge Atomics

Humanity faces two critical challenges: securing reliable energy and aggressively lowering our environmental impact. At Forge, we believe nuclear fission is the key to solving both ay Forge is developing the technology to rapidly scale the deployment of nuclear fission.

Responsibilities
  • Design, build and test pressure vessels, containment structures, seismic isolation, and secondary structures for Ember, our pilot nuclear reactor
  • Carry out trade studies for optimal structural materials, balancing cost, mass, strength, corrosion resistance, and manufacturability
  • Validate reliability of designs with rigorous testing: thermal cycling, pressure cycling, shock, vibration, radiation embrittlement, and corrosion. Design experiments to ground analysis, develop fixturing, and create technical reports based on results
  • Work with manufacturers to understand process limitations and adapt designs for lead times and manufacturability
  • Collaborate with peers from different systems to develop designs that balance cost, efficiency, and deployment logistics
  • Support the assembly of your hardware in the factory, witness your designs being brought to life daily, and watch them power an abundant, clean future
  • Provide training and mentorship to junior structures 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 mechanical 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 designing, testing, and operating high-pressure systems and pressure vessels
  • Experience with forging for large, high-pressure vessels
  • Experience with welding processes, inspection, and qualification
  • Experience designing to the ASME Boiler and Pressure Vessel Code
  • Hands-on experience with fluid, gas, or thermal systems
Additional Requirements
  • Position will be based in the South Bay area of Los Angeles County and will require relocation if not already local. 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
  • Pay range:
  • Senior: $ - $/per year + equity
  • Your actual level and base salary will be determined on a case-by-case basis and may vary based on the following considerations: job-related knowledge and skills, education, and experience.
  • Base salary is just one part of your total rewards package  may also be eligible for 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. You will also receive access to comprehensive medical, vision, and dental coverage, access to a 401(k) retirement plan, paid vacation, paid…
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