Senior, Thermo-Mechanical Design Engineer Reactor Cavity Cooling Systems

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

As a Senior Thermo-Mechanical Design Engineer you will be the Responsible Engineer (RE) for the Reactor Cavity Cooling System (RCCS) leading the design and analysis of a critical deployment system. You will be responsible for the thermal mechanical and piping design of the RCCS ensuring the reactor cavity and surrounding structures remain within design temperature limits while minimizing wasted thermal power. This role involves thermal-fluid analysis piping and structural sizing filtration system design and integration of piping supports stacks and cavity components. The ideal candidate has expertise in thermal-fluid systems HVAC piping and structural design and enjoys solving multidisciplinary engineering challenges in a highly constrained design environment.

Roles and Responsibilities:

• Perform thermal-fluid mechanical and structural analyses to support the sizing layout and optimization of cooling system components including piping ducts stacks supports filtration equipment and reactor cavity structures.

• Define system architecture operating limits design margins and control strategies to ensure reliable performance across all operating conditions.

• Develop design documentation including engineering calculations system specifications interface definitions design reports and technical justifications to support licensing and design reviews.

• Support the design fabrication and execution of component and system-level testing by developing test articles test stands instrumentation plans and validation procedures to demonstrate system performance and life-cycle reliability.

• Coordinate cross-functionally with reactor systems structures licensing manufacturing procurement and operations teams to ensure successful integration of the RCCS into the overall plant design.

• Support supplier selection technical evaluations design reviews and resolution of manufacturing and installation issues.

• Present technical work at internal and external design reviews and provide engineering leadership throughout the design analysis testing and deployment lifecycle.

Basic Qualifications:

• Bachelors degree in Mechanical Engineering Aerospace Engineering Nuclear Engineering or a related engineering discipline with an emphasis on thermal-fluid sciences heat transfer

• 5 years of professional engineering experience in the design analysis or development of thermal-fluid HVAC heat transfer or cooling systems.

• Experience performing engineering analyses including thermal fluid flow and structural calculations to support component and system design.

• Demonstrated ability to work effectively on multidisciplinary engineering teams and communicate technical concepts to a variety of stakeholders.

Preferred Skills & Experience:

• Masters degree or higher in Mechanical Engineering Aerospace Engineering Nuclear Engineering Thermal Sciences or a related discipline.

• Experience designing or analyzing natural circulation buoyancy-driven or convective heat transfer systems using CFD or multiphysics simulation tools.

• Demonstrated expertise in HVAC or industrial ventilation system design including equipment selection ducting filtration airflow management and system performance testing.

• Proficiency with engineering analysis and simulation tools such as ANSYS COMSOL Multiphysics or equivalent finite element (FEA) and computational fluid dynamics (CFD) software.

• Knowledge of materials and structural design considerations including material selection for heat transfer applications thermal stresses creep corrosion and environmental degradation.

• Experience designing systems in accordance with ASME Boiler & Pressure Vessel Code ASME B31 piping codes or other applicable mechanical and structural design standards.

• Experience serving as a technical lead or Responsible Engineer coordinating multidisciplinary engineering activities from concept development through testing and deployment.

Additional Requirements:

• Ability to work long hours and weekends as necessary to support critical milestones.

Location:

• We are located in Torrance CA in a 322000 square foot brand new facility featuring large open spaces for team collaboration R&D and production as well as easy access to the 405 105 and 110 freeways. Our facility is in the heart of Los Angeles vibrant emerging tech ecosystem alongside many other high growth startups and enterprises.

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