About the job
About Poseidon Aerospace
Poseidon Aerospace designs and operates unmanned aircraft for commercial logistics and defense. The company’s main platforms, the Heron seaplane and the Egret STOL aircraft, are built to transport payloads up to two tons across distances greater than one thousand nautical miles. Headquarters are in San Francisco, with additional offices in Washington, DC and Maine.
Role Overview: Mechanical Engineer – Recent Graduate
This role focuses on designing structural and mechanical systems that improve the performance and manufacturability of composite aircraft. Mechanical Engineers at Poseidon Aerospace work on CAD design, develop mechanisms, and conduct finite element analysis to create lightweight, reliable structures for both aerial and marine use.
What You Will Do
- Design mechanical and structural components for unmanned aircraft using CAD tools
- Develop mechanisms that support aircraft functionality and manufacturability
- Apply finite element analysis to optimize structures for strength and weight
- Collaborate closely with manufacturing engineers, aerodynamics experts, and test teams
- Participate in both analytical work and hands-on development of flight hardware
Location
This position is based in San Francisco.

