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Manufacturing Engineer II-Senior, Assembly & Integration

Antares


Job Location:

Los Angeles, CA - USA

Yearly Salary: USD 112000 - 185000
Posted: 18 August 2026 (16 days ago)
Application Deadline: 15 November 2026
Vacancies: 1 Vacancy

Job Summary

About Us

At Antares our long-term mission is to make clean energy abundant from Earth to the Asteroid Belt. Were fueled by the belief that advanced nuclear energy can strengthen our military solve the climate crisis elevate global living standards and expand humanitys presence in outer space. To achieve our mission were building mass-producible inherently safe deployable microreactors that can be used terrestrially underwater and in space.

The Antares team hails from SpaceX the White House the Pentagon the Department of Energy MIT Rigetti Computing General Atomics Relativity Space Ursa Major and National Laboratories like Idaho Oak Ridge Los Alamos and Savannah River. Antares has raised over $600M in venture capital from top-tier investors and has hundreds of million-dollars on contract with the military services NASA and the Department of Energy.

About the team

We are looking for a Manufacturing Engineer to take lead on the assembly of our full scale full power reactor on-site at Antares Prime. This person would work with design quality supply chain and many other teams to provide DFM to design define build processes procure capital equipment and tooling execute development builds and ultimately launch production of the R1 nuclear reactor.

Role & Responsibilities

Own manufacturing process development for major reactor assemblies and subsystems

from engineering release through build inspection test and final integration.

Develop detailed assembly and manufacturing process flows including shop floor

layouts

Partner closely with mechanical electrical nuclear systems materials quality and test

engineers to ensure designs are manufacturable inspectable and testable.

Develop and mature tooling fixtures handling equipment and specialized

manufacturing equipment required to build reactor hardware.

Establish robust processes for first-of-a-kind hardware balancing immediate prototype

needs with the long-term requirements of a scalable production system.

Work directly with manufacturing technicians and operators on the floor to

troubleshoot build issues improve processes and incorporate lessons learned.

Develop and maintain manufacturing bills of material (mBOMs) process plans and

configuration-controlled manufacturing documentation.

Participate in manufacturing readiness reviews design reviews production readiness

reviews and hardware build reviews.

Mentor junior and mid-level manufacturing engineers and help establish a culture of

technical rigor ownership and continuous improvement.

Basic Qualifications

Bachelors degree in Mechanical Manufacturing Industrial Aerospace Nuclear or a

related engineering discipline.

2 years of experience developing and implementing manufacturing processes for

complex hardware.

Demonstrated experience taking hardware from engineering design through prototype

development qualification and production.

Extensive experience creating manufacturing documentation including work

instructions process specifications assembly procedures inspection plans and test

procedures.

Strong understanding of GD&T tolerance analysis engineering drawings and

configuration management.

Experience working directly with technicians machinists fabricators inspectors and

production personnel.

Proven ability to troubleshoot manufacturing problems on the floor and drive issues

through root cause corrective action and process improvement.

Strong understanding of DFM/DFA principles and the ability to effectively influence

design decisions.

Experience developing or implementing manufacturing tooling fixtures and specialized

equipment.

Ability to work effectively across engineering manufacturing quality supply chain test

and operations organizations.

Strong technical communication skills and the ability to clearly document complex

processes.

Ability to operate independently in a fast-paced highly technical and ambiguous

environment while maintaining exceptional attention to detail.

Demonstrated ownership of large technically complex projects with significant cross-

functional impact.

Preferred Skills & Experience

5 years of experience developing and implementing manufacturing processes for

complex hardware.

Experience with aerospace or nuclear reactor components pressure vessels

primary/secondary systems fuel systems thermal systems or reactor instrumentation

and controls.

Experience developing manufacturing processes subject to nuclear quality assurance

requirements or other rigorous quality/regulatory frameworks.

Working knowledge of ASME Section III NQA-1 or comparable nuclear quality

requirements.

Experience with process qualification and validation for special processes.

Experience with PFMEA process capability studies statistical process control value-

stream mapping and capacity analysis.

Experience developing manufacturing processes for safety-significant or safety-critical

hardware.

Experience transitioning low-volume prototype hardware into repeatable production.

Familiarity with manufacturing execution systems ERP/MRP systems PLM systems and

digital work-instruction platforms.

Experience working in an environment where configuration control traceability

material control and process documentation are critical to product acceptance.

Culture

At Antares we like to specifically tie each role to our founding documents set of valueshere are the top five cultural values we think you should believe at your core to be successful:

  • Think in Systems - Energy and Defense are complex ecosystems with numerous stakeholders with competing priorities conflicting policies perverse incentives and emergent and path-dependent properties. First principles thinking alone is insufficient. Think probabilistically and then take action. If you want to be certain then you are apt to be obsolete. Over-optimizing the components often degrades the system

  • Obsess over the End User - The customer and end user are often not the same. We will never build globally competitive commercial products if we lose sight of our end users and their entire interaction with the product life cycle

  • Be Unconstrained by Convention - Our only limits are the laws of physics. Many even experts will say what we are working on is impossible. They said the same about SpaceX reusing rockets. Generationally impactful companies by definition must accomplish the seemingly impossible. If it were easy it would have already been done. Never shy away from a solution because it has never been tried before and never choose to do something because thats how its always been done

  • Go Where the Work Is - Never miss a chance to meet a customer user or stakeholder face to face even if that means hopping on a plane. If you cant make it find a teammate who can channel your intentions and go in your place. Deep work can be done from anywhere but we believe teams are built in person and aim to maximize our time together

  • Operate in the Grey - Embrace nuance in pursuit of truth. Question every fundamental assumption

Equal Opportunity

Antares is an Equal Opportunity Employer. Employment decisions are based solely on merit competence and qualifications without regard to race color religion gender national origin/ethnicity veteran status disability status age sexual orientation gender identity marital status mental or physical disability or any other legally protected status.

ITAR Requirements

To conform to U.S. Government export regulations applicant must be a (i) U.S. citizen or national (ii) U.S. lawful permanent resident (aka green card holder) (iii) Refugee under 8 U.S.C. 1157 or (iv) Asylee under 8 U.S.C. 1158 or be eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here.


Required Experience:

IC


About Company

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Factory-produced, deployable fission microreactors to provide strategic energy for mission-critical systems across Earth, space, and underseas.

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