Thermal - Fluids Analyst I​/II

Roles and Responsibilities

• Assess subcomponent designs for pressure drop, heat transfer capabilities, and other performance characteristics using a combination of hand‑calcs, in-house tools, and CFD
• Collaborate with designers and responsible engineers to provide guidance on initial sizing, material selection, and design feedback based on analytical results
• Compile detailed documentation of analytical results and communicate key results, assumptions, and limitations to stakeholders throughout the company and external customers
• Provide support to test engineers in the form of collaborative test design, instrumentation selection, and data review to ensure test campaigns provide the necessary data to validate our models
• Develop internal tools and calculators to enable other engineers to quickly and independently perform analytical assessments of their designs without the need for detailed finite element models
• Provide technical mentorship and guidance to other engineers and across teams

• Bachelor's in Mechanical or Aerospace Engineering or similar technical discipline
• Experience building and running CFD models using commercial codes such as Fluent, CFX, and Star-CCM+, including conjugate heat transfer models and compressible equations of state
• Experience using Computer Aided Design (CAD) software for design modification and model defeaturing (Siemens NX or similar)
• Experience in Python, Mat Lab, VBA, or other scripting language to build and maintain tools and calculators

• Master's in Mechanical or Aerospace Engineering or similar technical discipline
• 3+ years experience performing thermal‑fluids analysis
• Familiarity with 1-D fluid network tools such as Flownex, Sinda-Fluint, or RELAP5
• Participation in regulatory qualification or certification programs for safety critical systems in the aerospace or nuclear industry
• Understanding and experience of implementing numerical methods to solve fluid‑dynamic and thermodynamic systems
• Experience working with multiphase fluid & heat transport systems (Heat Pipes, Rankine Cycle Engines, Saturated Cryogenic Storage)
• Familiar with ASME BPVC Section III Div 5
• Experience building and running Finite Element Analysis (FEA) models
• Comfortable in fast‑paced environment with rapid design iteration loops

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

Engineer I comp band - $90K - $115K

Engineer II comp band - $112K - $150K

We are located in Torrance, CA in a 322,000 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.

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.