Senior Mechanical Design Engineer (PCS) at Antares

Department: Reactor Hardware Engineering

Compensation

$115,000 – $185,000/yr

Location: Los Angeles, California
Type: Full-time
Level: senior
Posted: Aug 24, 2026

Description

Antares is hiring a Mechanical Design Engineer II to design and integrate the hardware of its Power Conversion System, including pressure boundaries, piping, rotating-machinery supports and alignment, thermal growth, interfaces, assembly, test-rig instrumentation, and high-temperature components. The role carries the mechanical arrangement and pressure budget through fabrication, assembly, testing, and design revision, and requires a bachelor's degree in mechanical, aerospace, or a related engineering discipline plus 5+ years of experience for the Senior Engineer level. The position is based in Torrance, California, with a salary range of $145,000 to $185,000.

Required Skills

CAD
Pressure boundary
GD&T
Thermal growth
Structural FEA
NX
ANSYS
Femap

Additional Information

Minimum Education: Bachelor's degree in Mechanical, Aerospace, or a related engineering discipline
Required Previous Experiences: 5+ years of experience for Senior Engineer, including hands-on CAD, analysis, fabrication support, and test
Experience designing pressure-retaining or leak-tight fluid hardware and supporting pressure and leak verification
Experience releasing production-intent mechanical drawings and models for fabrication, including GD&T and tolerance stack-up
Experience designing hardware for elevated-temperature or high-stress service, including material selection
Experience working the mechanical interfaces between multiple components integrated into a single assembly
Preferred Qualifications: Experience in the Nuclear, Aerospace, Automotive, Power Generation, Motorsports, or Oil and Gas industries
Experience designing to pressure-boundary codes and standards such as ASME B31.3 or ASME BPVC Section VIII, and writing or executing pressure and leak test procedures
Experience with compressible flow and flow network or pressure-drop modeling
Experience packaging or integrating rotating machinery, including alignment, supports, and machinery loads
Experience with high-temperature systems, including thermal growth accommodation, expansion joints and bellows, and insulation design
Experience with skid-mounted or modular plant packaging, system layout, and designing for maintenance access
Experience with piping flexibility and stress analysis and structural FEA of supports and anchors
Experience with high-temperature metals and advanced materials, including creep-limited design in stainless steels or nickel superalloys
Experience designing to transport and seismic load cases
Experience supporting test rig design, instrumentation and sensor placement, and using test data to drive design changes
Experience with design engineering tools such as NX, ANSYS or Femap, and other product lifecycle software
Experience commissioning first-of-a-kind hardware and supporting bring-up and troubleshooting
Experience in a demanding, fast-paced development environment