The ideal candidate brings deep hands-on mechanical design and CAD expertise, strong experience with complex assemblies, packaging, and integrated systems, demonstrated prototyping and analysis skills, and the ability to provide mechanical leadership within cross-disciplinary teams spanning mechanical, electrical, RF, power, manufacturing, and systems engineering. Role Overview: CHAOS is seeking a Principal Mechanical Engineer to serve as a technical authority for the hands-on design, development, packaging, integration, and qualification of ruggedized sensor systems, avionics, electronic hardware, and related mission-critical systems for dual-use aerospace and defense applications.