About the role#
The Analysis team at Antares develops and applies physics-based models to guide the design, testing, and development of reactor systems. You will work across engineering disciplines to size components, understand thermal and fluid performance, evaluate structural response, and turn simulation and test data into engineering decisions. Interns are integrated as first-year junior engineers, starting with starter projects before taking ownership of a long-duration project that culminates in a technical presentation.
What you'll do#
- Build CFD models of reactor components to evaluate fluid flow, heat transfer, and performance.
- Build FEA models of reactor components to evaluate thermal and structural behavior.
- Develop Python tools to support the sizing and evaluation of new designs.
- Process, review, and interpret test data, comparing results with analytical and numerical predictions.
- Define model assumptions, boundary conditions, and inputs while assessing convergence, sensitivity, and model fidelity.
- Document methods, results, limitations, and recommendations in technical deliverables.
- Collaborate with mentors and cross-functional partners while identifying technical risks and opportunities for improvement.
What you'll need#
- Currently enrolled in a bachelor's degree program in mechanical, aerospace, nuclear, chemical, or a relevant engineering discipline, entering your junior or senior year.
- Prior internship experience or more than one year of significant project-team, laboratory, or research experience.
- Preferred: GPA of 3.5 or above.
- Preferred: Experience in a university club or organization.
- Preferred: Strong interpersonal and technical communication skills.
- Preferred: Strong analytical and problem-solving skills with attention to detail.
- Preferred: Ability to work cross-functionally and effectively in a dynamic environment.
- Preferred: Experience with Python and engineering data analysis.
- Preferred: Experience with CFD, FEA, CAD, MATLAB, or related modeling tools.
- Preferred: Coursework or project experience in thermodynamics, fluid mechanics, heat transfer, numerical methods, or solid mechanics.
Location & details#
- Location: Torrance, California, United States.
- Term: Summer 2027.
- Modality: On-site, five days per week.
- Employment: Full-time internship.
- Compensation: Paid position with a relocation and housing stipend.
About Antares
Antares is a defense and space manufacturing company based in Los Angeles. Founded in 2023, the firm builds compact nuclear microreactors for remote military bases and industrial sites. It currently employs between 11 and 50 people. The company has secured over 130 million dollars in investment to support its hardware development.
How to get in at Antares
Securing an internship at Antares requires speed because early applicants often get seen before the pile grows. Intern Insider sends an instant alert the moment a role matching your target is published anywhere, so you can apply among the first. This gives you a clear advantage in a competitive field where timing matters. You can also improve your response rates by reaching out to the recruiters behind the company roles directly. Intern Insider surfaces these contacts so you can ask about the role or a referral, which is more effective than applying into a queue. This approach helps you bypass the standard process and connect with the people who actually make the hiring decisions.



