Nuclear Engineer III

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 Role

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 youre not afraid to operate as a generalist in a growing organization.

Roles and Responsibilities:

• 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

Basic Qualifications:

• Bachelors degree in Nuclear Engineering or related technical field

• Familiarity with neutron transport software (MCNP Serpent SCALE)

Preferred Skills & Experience:

• 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

Pay Ranges

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.

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.

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