# Senior Engineer, Mechanisms (R4890)

**Company:** [Shield AI](https://hotfix.jobs/companies/shield-ai)
**Location:** San Diego, CA, Dallas, TX, California
**Role:** Hardware Engineering
**Salary:** $110k – $160k/yr
**Experience:** 5+ years
**Skills:** Nx, CAD, FEA, GD&T, Kinematic Analysis, Structural Analysis, Tolerance Stack-Ups, Fmea, Doe, Mil-Std-810
**Posted:** 2026-04-29

> Designs complex electro-mechanical mechanisms for autonomous UAVs, owning full process from concept to testing. Requires 5+ years mechanical design experience, BS in Mechanical/Aerospace Engineering, strong CAD/FEA skills.

## Job Description

## Responsibilities

- 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
- 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 in fast-paced, cross-functional teams

## 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**, **MIL-STD-810**, structural, or actuated mechanism testing experience

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