Summer 2026 Engineering Internship
castelion
About this role
Castelion offers summer internships in aerospace engineering, focusing on missile systems development, testing, and integration. Interns gain hands-on experience working with advanced defense technologies in a collaborative startup environment, contributing to projects that impact national security.
Skills
Qualifications
About castelion
castelion.comCastelion designs, tests, and manufactures next‑generation military systems rapidly and at massive scale to deter future wars. The company integrates rapid engineering, prototyping, testing, and high‑rate production to field advanced defense capabilities. Serving military and government customers, Castelion emphasizes speed, scalability, and rigorous validation to deliver resilient systems when and where they’re needed.
About castelion
Headquarters
San Francisco, CA
Company Size
201-500 employees
Founded
2018
Industry
Technology
Glassdoor Rating
4.2 / 5
Leadership Team
Sarah Johnson
Chief Executive Officer
Michael Chen
Chief Technology Officer
Emily Williams
VP of Engineering
David Rodriguez
VP of Product
Jessica Thompson
Chief Financial Officer
Andrew Park
VP of Sales
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View leadership team, funding history,
and employee contacts for castelion.
Salary
$60k
per year