Thermal - Fluids Analyst I / II
💰 $90,000 – $115,000/yr
At a glance
- Who can apply
- United States
- Work arrangement
- Remote · Remote
- Employment type
- Full-time
- Experience
- 3+ years (as stated by the employer)
- Salary
- $90,000 – $115,000/yr · published by the employer
- ✓ Open to early-career candidates
Checked against the employer's source on October 15, 2026. Details come from the employer's posting; confirm them on the application page.
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Job Description
About Us
At Antares, our long-term mission is to make clean energy abundant from Earth to the Asteroid Belt. We’re fueled by the belief that advanced nuclear energy can strengthen our military, solve the climate crisis, elevate global living standards, and expand humanity's presence in outer space. To achieve our mission, we’re 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 an analyst at Antares your primary responsibility will be building and running thermal-fluids models of components and subsystems throughout the reactor core and power conversion system to ensure our designs will meet thermal, mechanical, operational, and performance requirements within the extreme environments of our R1 micro-reactor. Design engineers will rely on your modeling and technical expertise for iterative design feedback and optimization, while adhering to best practices for DFM (design for manufacturing) and maintaining a rapid pace of development. Antares aims to maintain close collaboration between testing and analysis teams, and to this end you may often be asked to provide technical support before, during, and after test campaigns. This may take the form of cooperative planning of testing goals, instrumentation requests, root cause analysis in the event of failures, post-test data review, and model validation/anchoring.
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
Basic Qualifications:
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, MatLab, VBA, or other scripting language to build and maintain tools and calculators