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About Us At Antares, our long-term mission is to make clean energy abundant from Earth to the Asteroid Belt. We’re fueled by the belief that advanced nuclear energy can strengthen our military, solve the climate crisis, …
Skills: Neutronics Modeling, MCNP, Serpent, SCALE, Multiphysics Analysis
Los Angeles, California, United States · On-site
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We are a fast-paced business with ambitious growth plans; so if you are dedicated, enthusiastic and always seeking ways to improve, you'll enjoy a career with us! Ontic is a leading global aerospace OEM trusted by the wo…
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Los Angeles, California, United States · On-site
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Director of Recruiting Location Los Angeles, CA (Hybrid) About Observable Space At Observable Space, we're redefining how humanity observes and connects with the universe. We're a vertically integrated, high-growth space…
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Phoenix, Arizona, United States · Remote OK
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Owens & Minor is a global healthcare solutions company providing essential products, services and technology solutions that support care delivery in leading hospitals, health systems and research centers around the world…
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Los Angeles, California, United States · Hybrid
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Company Overview At Motorola Solutions, we believe that everything starts with our people. We’re a global close-knit community, united by the relentless pursuit to help keep people safer everywhere. We build and connect …
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Los Angeles, California, United States · On-site
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Hermeus is a venture-backed defense aviation company reclaiming the lost art of rapid iterative prototyping to build the fastest aircraft in the world today. By prioritizing relentless hardware iteration, we deliver high…
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Los Angeles, California, United States · On-site
Dreaming big is in our DNA. It’s who we are as a company. It’s our culture. It’s our heritage. And more than ever, it’s our future. A future where we’re always looking forward. Always serving up new ways to meet life’s m…
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Los Angeles, California, United States · On-site
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Dreaming big is in our DNA. It’s who we are as a company. It’s our culture. It’s our heritage. And more than ever, it’s our future. A future where we’re always looking forward. Always serving up new ways to meet life’s m…
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Los Angeles, California, United States · On-site
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Job Title: Senior Associate, Manufacturing Engineer Job ID: 40179 Job Location: Canoga Park, CA Job Schedule: 9/80: Employees work 9 out of every 14 days – totaling 80 hours worked – and have every other Friday off Job D…
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Los Angeles, California, United States · On-site
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Job Title: Sr. Specialist, Project Engineering – Propulsion Systems Job ID: 40172 Job Location: Onsite at our Canoga Park, CA facility Job Schedule: 9/80: Employees work 9 out of every 14 days – totaling 80 hours worked …
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Los Angeles, California, United States · Remote OK
$230k–$323k/yr
Application close date: Applications will be accepted on an ongoing basis until the requisition is closed. At Blue Origin, we envision millions of people living and working in space for the benefit of Earth. We’re workin…
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Los Angeles, California, United States · Hybrid
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THE COMPANY Silvus Technologies, a leading provider of advanced MANET and MIMO communications systems, is reshaping mesh network technology for mission-critical applications – on the ground, in the air and at sea. Its ba…
Skills: Electromechanical Packaging Design, SolidWorks, CAD, Thermal Management, DFM/DFA
Los Angeles, California, United States · Hybrid
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Los Angeles, California, United States · On-site
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Company Description At Bosch Mobility Aftermarket, we believe in creating a work culture that embodies our core values of grow, enjoy, and inspire. Our Mobility Aftermarket division provides diagnostic and repair shop eq…
Skills: Consultative Sales, Relationship Building, Negotiation, Presentation Skills, CRM Proficiency
Los Angeles, California, United States · On-site
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Global Logistics Specialist Location: Los Angeles, 90065 Compensation: $85,000 – $110,000 annually (depending on experience) About the Role Reporting to the Fulfillment Operations Manager, the Logistics & Trade Complianc…
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Los Angeles, California, United States · On-site
$70k–$75k/yr
REVOLVE is the next-generation fashion retailer for Millennial and Generation Z consumers. As a trusted, premium lifestyle brand and a go-to source for discovery and inspiration, REVOLVE delivers an engaging customer exp…
Skills: Fabric Knowledge, Fiber Knowledge, Fabric R&D Processes, Cost Negotiation, Product Development
Los Angeles, California, United States · On-site
$70k–$75k/yr
REVOLVE is the next-generation fashion retailer for Millennial and Generation Z consumers. As a trusted, premium lifestyle brand and a go-to source for discovery and inspiration, REVOLVE delivers an engaging customer exp…
Skills: Fabric R&D, Textile Knowledge, Fiber Analysis, Cost Negotiation, Product Development
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The engineer will be responsible for key reactor design components such as reactivity controls, shielding, fuels, and thermal hydraulics. Duties include performing neutronics simulations, supporting multiphysics analyses, and participating in hardware prototype testing.
Candidates must have a Bachelor's degree in Nuclear Engineering or a related field and familiarity with neutron transport software. Preferred qualifications include Python programming skills and experience with advanced microreactors or multiphysics modeling.
At Antares, our long-term mission is to make clean energy abundant from Earth to the Asteroid Belt. We’re fueled by the belief that advanced nuclear energy can strengthen our military, solve the climate crisis, elevate global living standards, and expand humanity's presence in outer space. To achieve our mission, we’re building mass-producible, inherently safe, deployable microreactors that can be used terrestrially, underwater, and in space.
Formed in 2023, the Antares team hails from SpaceX, The White House, MIT, Rigetti Computing, The Air Force, General Atomics, Relativity Space, Ursa Major, and National Laboratories like Los Alamos, Idaho, and Oak Ridge. Antares has raised over $130M in venture capital from top-tier investors and has over $13M in government funding.
As a member of the nuclear engineering team, you will become the responsible engineer for a key component of the Antares reactor design such as reactivity controls and instrumentation, radiation shielding, fuels, materials, thermal hydraulics, safety, or licensing. The ideal candidate has a mix of industry and academic experience, and has worked in a team-oriented environment to mature nuclear concepts. While you may have a specialty, you’re not afraid to operate as a generalist in a growing organization.
Assist with neutronics modeling and simulations using MCNP, Serpent, or SCALE
Support Multiphysics analyses (thermal-hydraulics, heat transfer, structural mechanics)
Participate in experimental validation of simulation results
Collaborate with senior engineers on iterative design tasks
Contribute to documentation and regulatory reporting
Participate in hardware demonstrations and prototype testing
Bachelor's degree in Nuclear Engineering or related technical field
Familiarity with neutron transport software (MCNP, Serpent, SCALE)
Familiarity with Python or similar programming language
Coursework or internships involving Multiphysics modeling
Interest or experience in microreactors, heat pipe cooled reactors, or other advanced reactors
Exposure to fast-paced project environments
Proven ability to quickly learn new technical concepts
Strong communication skills
Nuclear Engineer I: 120k-135k
Nuclear Engineer II: 135k-165k
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.
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.
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.
At Antares, we like to specifically tie each role to our founding document’s set of values–here 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 that's “how it's 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 can’t 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
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.
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.
We build microreactors that work where nothing else can—and we’re just getting started.
Energy abundance unlocks progress. It powers missions, grows economies, strengthens national security, and expands what’s possible on Earth and beyond. But in the places where power is most critical, it’s often the hardest to deliver. That’s the problem we’re solving. At Antares, we’re building compact nuclear microreactors to deliver reliable, mobile energy where it’s needed most: remote military bases, austere industrial sites, and, one day, deep space and underwater missions. The U.S. nuclear industry hasn’t seen true momentum in decades. We’re moving it forward with urgency, humility, and a commitment to building what’s needed now. Our team includes engineers and operators from SpaceX, Relativity Space, Ursa Major, the White House, MIT, Rigetti Computing, and the U.S. Air Force. Backed by over $130M from top-tier investors, we’re focused on shipping hardware not hypotheticals.
Offices: Los Angeles, CA 90503, US · 215 Richland Ave E, Aiken, South Carolina 29801, US · 545 Shoup Ave, Idaho Falls, Idaho 83402, US
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