Principal Mechanical Engineer (Engineer Mechanical 5) - 29786

HII's Mission Technologies division•Alexandria, VA

1d•$143,140 - $235,000•Hybrid

About The Position

This opportunity resides with Warfare Systems (WS), a business group within HII’s Mission Technologies division. Warfare Systems comprises cyber and mission IT; electronic warfare; and C5ISR systems. HII works within our nation’s intelligence and cyber operations communities to defend our interests in cyberspace and anticipate emerging threats. Our capabilities in cybersecurity, network architecture, reverse engineering, software and hardware development uniquely enable us to support sensitive missions for the U.S. military and federal agency partners. Mission Technologies, a division of HII, is expanding - and we're looking for bold, inventive Prinicipal Mechanical Engineers to join our fast-moving, interdisciplinary teams in our Alexandria, VA. At Mission Technologies, we design and build customized, mission‑enabling solutions for the defense and intelligence communities—solutions that fuse cutting‑edge technology with real‑world tradecraft. Our teams are filled with imaginative builders, hands‑on problem solvers, and curious minds from a wide range of backgrounds. Here, collaboration isn’t just a value—it’s the way the work gets done. You’ll be part of small, high‑trust teams that turn ideas into functional hardware at remarkable speed. If you love tackling open‑ended problems, experimenting with new technologies, and seeing your designs come to life in the field, this is the place for you. Bring your mechanical engineering expertise—and shape the role based on your strengths, interests, and creativity. You’ll work on rapid‑turn projects that go from concept to deployment, contributing to hardware used by end‑users around the world.

Requirements

15 years relevant experience with Bachelors in related field; 13 years relevant experience with Masters in related field; or 10 years relevant experience with PhD or Juris Doctorate in related field.
Active US Secret clearance required, with ability to obtain TS/SCI.
Experience with mechanical CAD tools.
Proven mechanical design experience (mechanisims, power trains, thermal management, structures, embedded electronics).
Experience with various manufacturing methods (additive, machining, sheet metal, PCBAs, cable harnesses, composites).
Hands-on assembly experience.
Strong documentation skills (2D engineering drawings, PowerPoint, Visio, Adobe suite).
Creativity and comfort with open-ended, precedent-free problem solving.

Nice To Haves

Advanced fabrication experience (welding, composite layups, machining, industrial finishes and paints).
Simple embedded electronics work (Jetson, Arduino, RPi) and associated Python or C++ programming skills.
Experience using computational fluid dynamics (CFD and/or FEA for stress, deformation, and modal analysis).
Working knowledge of RF systems (signal analyzers, SDRs, antennas, amplifiers).
Experience with project management (Earned value mgmt, estimating, requirements capture).
An active TS/SCI clearance

Responsibilities

Provide support to the design, development, prototype fabrication, and verification testing of unique specialty products
Perform detailed system and sub-system analysis, simulation, and design work as required
Work with complicated mechanical system concepts and detailed designs to properly determine the necessary design tradeoffs
Interface with project teams and external customers as required, to support specialized product development
Participate in the assembly, system test planning, and system test procedure generation
Adequately document processes, procedures, and testing using structured formats. Where formats do not currently exists, provide a recommended format for review
Learn and utilize the Quality Management System (QMS) and existing tools and templates
Interface with project teams and external customers as required, to support specialized product development