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Sr. Manufacturing Engineer, Reactor Factory

AdAstra · Los Angeles, CA

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Level
Senior
Team
Manufacturing
Degree
Required
Experience asked
3+ years
Industry
Industrial
Posted
24 days ago

The role in 30 seconds

A senior manufacturing role at AdAstra (industrial) in Los Angeles, CA.

They ask for
3+ years · degree required
Tools it names
Root cause, GD&T, Validation (IQ/OQ/PQ), CNC, Machining, Welding

Read from the posting. The full description is below.

From the plant jobs report · week of November 2, 2026

Manufacturing Engineer roles in California: typical posted base $115k–$169k.

Median of the low and high ends of 150 live postings that list pay, out of 398 manufacturing engineer openings in California, read from manufacturers' own careers sites.

California plant jobs report →Pay by team and state →What moves pay →

How this role compares

Against 397 other live manufacturing postings in California.

Base pay
Not listed in this posting

Typical $110k–$159k, from 130 postings that list pay.

Experience asked
Less than usual (3+ vs 5+)

Similar roles usually ask 5+ years.

Skills these teams ask for most

  • ✓ Tooling 52%
  • New product launch 47%
  • ✓ Root cause 38%
  • Automation 34%
  • ✓ Machining 27%
  • CATIA / NX 27%

✓ = this posting asks for it too. % = share of similar postings that mention it.

Stands out: this posting asks for CNC, which few similar roles mention. If you have it, lead with it.

It asks for 3+ years. If you're close, apply anyway: requirements are a wish list. Talk to someone doing this work there first.

At a glance

Pulled from the posting text. If it's not listed here, the posting didn't say.

How to get in at this plant

Five moves over a week or two. The first one takes ten minutes.

  1. 1

    Pick 2–3 people on the Manufacturing team at AdAstra

    Engineers who joined in the last year or two reply the most. Use the team search on this page to find them.

  2. 2

    Send a short, curious note

    One real question about their work. No favors yet. Each person gets a different note, written for this role.

  3. 3

    Turn a reply into a short call

    Questions worth asking about this team:

    • What does a normal week look like on your team?
    • Is the work mostly new product launches or sustaining existing lines?
    • How much time do you spend on the floor versus at a desk?
    • How did you land the job? What stood out in your interviews?
  4. 4

    Apply with someone vouching for you

    If the call went well, ask whether they’d pass your résumé to the hiring manager. Send your résumé link, apply that day, and let them know.

  5. 5

    Bring proof to the interview

    One page of before-and-after numbers from projects you led: scrap, OEE, cycle time, cost. Plant managers hire on results.

Full description from AdAstraAs posted on their careers site.Show

Responsibilities

Provide end-to-end ownership of high-rate reactor production line design, bring-up, operations, and improvements for the factory's most complex, highest-impact areas

Perform hands-on design for manufacturability engineering during the reactor development cycle; act as primary liaison between design and production teams

Own reactor component manufacturability from first prototype builds through introduction into high-rate manufacturing

Contribute to design reviews as an expert in design for manufacturability, design for inspectability, yield and cost improvements, supplier assessments, and quality control

Act as primary point of contact for non-conforming product — troubleshooting, root cause, failure investigation, and corrective actions

Lead initial supply chain development for critical materials and outside processes (forgings, plate and tube stock, specialty fabrication)

Own the design and validation of fixtures, tooling, and new technology introduced to the production line

Prepare engineering documentation for the development-to-production transition — assembly procedures, test/inspection procedures, SOPs, process travelers, BOMs, and mechanical drawings

Lead continuous improvement efforts on established production lines and products

Perform structured root cause analysis of in-process failures

Provide training and mentorship to junior manufacturing engineers, setting the standard for technical rigor across the team

Basic

Qualifications

Bachelor's degree in manufacturing engineering, mechanical engineering, industrial engineering, or related discipline

3+ years of engineering experience developing manufacturing processes or designing, building, or testing hardware

Preferred Skills and Experience

Strong ability to use data and analysis to make fast data-driven decisions

Strong understanding of engineering fundamentals and core manufacturing processes

Ability to perform trade studies and make clear recommendations using first principles, even with partial information

Hands-on shop experience (machining, welding, fabrication, assembly) and comfort with GD&T

CNC programming/CAM workflows, process control and capability analysis, or production line ramp-up experience

Experience acting as a technical lead — scoping work, reviewing designs and processes, guiding other engineers to successful outcomes

Experience at a nimble engineering organization requiring a scrappy, entrepreneurial approach under tight time or budget constraints

Experience building hardware, or a passion for contributing to a work product that operates in the real world

Demonstrated rapid growth — successive positions of increasing responsibility, getting up to speed quickly, and accomplishing something meaningfully difficult early in your career

Note: this role is one of three levels on the Manufacturing Engineer, Reactor Factory track (Level I, Level II, and Sr.) — leveling is determined based on experience and interview performance.

Logistical

Show full description ↓

About the Company

Humanity faces two critical challenges: securing reliable energy for everyone and aggressively lowering our environmental impact. Nuclear fission is the key to solving both at once, and our client is actively developing the technology to rapidly scale the deployment of nuclear fission today .

This is a direct hire, permanent placement position for a client of AdAstra Talent Advisors. This position is based in El Segundo, CA. More company details will be shared during an initial call.

The Opportunity

As Sr. Manufacturing Engineer, Reactor Factory, you'll lead manufacturing and test of machined components, welded pressure vessels, compact heat exchangers, and other reactor system components to rapidly ramp production of our client's first nuclear reactor.

You'll own the factory's highest-impact projects — standing up new production cells and driving the continuous improvement and innovation required to achieve high-quality and high-rate throughput — while setting the technical bar for the manufacturing engineering team.

Successful candidates will have previously demonstrated extreme ownership in simplifying, innovating, or otherwise improving products and/or production lines and processes, and will be highly motivated to power humanity with abundant, clean energy.

On-site in El Segundo, CA

Ability to work extended hours and weekends as necessary

Ability to travel to suppliers and reactor construction sites in other states as necessary

U.S. Person Requirement

Requires U.S. Person status per export control regulations (10 CFR Part 810). Candidates who are citizens of countries not on Part 810 Appendix A cannot currently be considered, even with a green card.

Comprehensive medical, dental, and vision coverage

401(k) retirement savings plan

Paid vacation and paid parental leave

Long-term incentives via company stock/stock options, plus an Employee Stock Purchase Plan

Potential discretionary bonuses

About AdAstra

AdAstra Talent Advisors is a headhunting and talent advising firm focused on the Climate, Space, and Defense sectors of Hard Tech. We specialize in pairing highly technical and executive talent with some of the world's leading Hard Tech startups.

At AdAstra, we catalyze the innovations that future gener

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