Senior Mechanism Design Engineer (San Diego)

Shield AI is seeking a Senior Mechanisms Design Engineer with deep expertise in mechanism design to support the development of our next-generation autonomous UAV platform. In this high-ownership role, you will lead the architecture, design, and development of precision mechanical systems and actuation mechanisms that are critical to mission success.

You will work closely with cross-functional teams to create rugged, lightweight, and manufacturable mechanisms-ranging from landing gear to deployable payload systems-while delivering high performance in dynamic and harsh environments. This is an opportunity to design at the edge of innovation and autonomy, with real-world impact.

What you'll do:

• Design complex electro-mechanical mechanisms for autonomous aircraft
• Own the full design process: concept, CAD, tolerance analysis, material selection, and drawing release
• Perform structural and kinematic calculations and preliminary FEA
• Prototype, test, and iterate mechanism designs for functionality and reliability
• Collaborate with electrical, avionics, flight controls, and propulsion teams
• Mentor junior engineers and promote engineering excellence
• Support pre-production builds, prototype integration, and ground/flight testing

Required qualifications:

• B.S. in Mechanical/Aerospace Engineering
• 5+ years in mechanical or mechanism design
• Strong CAD skills (NX preferred)
• Kinematic analysis and optimization
• Structural analysis utilizing hand calculations and finite element methods
• FEA analysis: Modal, non-linear and linear, buckling, fatigue
• GD&T and tolerance stack-ups for mechanical systems
• Materials selection inclusive of alloys, heat treatments, allowables, and finishes
• Ability to work independently and lead in fast-paced, cross-functional teams
• A demonstrated record of working hard, being trustworthy, holding yourself to high standards, and being kind to others

Preferred qualifications:

• Experience with UAVs, aircraft, or robotic systems
• Familiarity with electro-mechanical actuators
• Proficiency in FMEA, DOE, and root cause analysis
• Hands-on machine shop or mechanic experience (professional or hobby)
• RTCA DO-160, structural, or actuated mechanism testing experience
• Ability to thrive in startup, R&D, or defense innovation environments