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Salary: USD 115,000 - 150,000 / annual
Antares is building mass-producible, inherently safe, deployable microreactors for terrestrial, underwater, and space applications. The company's mission is to make clean energy abundant from Earth to the Asteroid Belt, with a team drawn from SpaceX, the White House, the Pentagon, the Department of Energy, MIT, and national laboratories. Antares has raised over $600M in venture capital and holds hundreds of millions in contracts with military services, NASA, and the Department of Energy.
As a Structures Engineer II, you will design, analyze, and develop critical reactor structures including the core restraint mechanism, control drum support and mounting systems, primary heat exchanger vessel supports, and other safety-significant structural components. You will ensure these systems meet structural, thermal, and functional performance requirements throughout development, testing, and operation. Working in a highly constrained, multidisciplinary design environment, you will support prototype fabrication, testing, qualification, and deployment.
Key responsibilities include:
- Performing thermal, mechanical, and structural analyses to support sizing, layout, and optimization of reactor structural components
- Defining system architecture, operating limits, design margins, and concepts of operation (CONOPS)
- Developing engineering documentation including calculations, specifications, interface definitions, design reports, and technical justifications
- Leading design, fabrication, and execution of component- and system-level testing by developing test articles, fixtures, instrumentation plans, and validation procedures
- Collaborating cross-functionally with reactor, thermal, manufacturing, licensing, and procurement teams
- Supporting supplier selection, technical evaluations, design reviews, and resolution of manufacturing and assembly issues
- Presenting technical work at internal and external design reviews and providing technical leadership throughout the lifecycle
REQUIREMENTS:
Basic Qualifications:
- Bachelor's degree in Mechanical Engineering, Aerospace Engineering, Nuclear Engineering, or related engineering discipline
- 2+ years of professional experience designing, analyzing, and developing structural systems for demanding engineering applications
- Experience in structural design including hand calculations, material selection, bolted and welded joint design, load path development, and thermo-mechanical trade studies
- Experience using finite element analysis (FEA) tools to evaluate structural performance, stress, deformation, fatigue, and thermal loading
- Knowledge of structural design principles, materials, bolted and welded joints, and load path development
- Demonstrated ability to work effectively on multidisciplinary engineering teams and communicate technical concepts to broad audiences
Preferred Qualifications:
- Master's degree or higher in Mechanical Engineering, Aerospace Engineering, Civil Engineering, Nuclear Engineering, or related discipline
- Demonstrated expertise in structural design with hand calculations, material selection, bolted and welded joint design, and thermo-mechanical trade studies
- Proficiency with structural analysis tools such as ANSYS Mechanical, Abaqus, Nastran, or equivalent FEA software
- Strong understanding of material behavior including thermal stresses, creep, fatigue, fracture, buckling, corrosion, and high-temperature performance
- Experience designing hardware per ASME Boiler & Pressure Vessel Code, AISC, ACI, AWS, NASA, or other applicable standards
- Experience as a Technical Lead or Responsible Engineer leading multidisciplinary efforts from concept through deployment
- Experience developing first-of-a-kind hardware in regulated industries such as nuclear, aerospace, defense, energy, or safety-critical applications
Additional Requirements:
- Ability to work long hours and weekends as necessary to support critical milestones
- Must be a U.S. citizen, national, lawful permanent resident, Refugee, or Asylee, or eligible to obtain required ITAR authorizations from the U.S. Department of State
