Principal Mechanical Engineer - Test Equipment, Onsite (Tewksbury/Andover, MA)

Principal Test Equipment Mechanical Engineer responsible for designing, developing, documenting, and maintaining complex mechanical test environment systems for Raytheon products. Focus areas include vibration, thermal, hydraulic, radio frequency, and electro-optical testing for production environments. Responsibilities include integrating and validating test systems against stringent accuracy and reliability requirements, evaluating production installations and recommending design modifications, supporting onsite manufacturing builds, troubleshooting mechanical fixtures with root-cause corrective action, and managing release of technical data packages. This role is 100% onsite in Tewksbury/Andover, MA and may involve in-person interview steps. The candidate should have CAD (ProE/CREO) skills, GD&T proficiency, experience with mechanical sub-systems and environmental testing, and familiarity with configuration management and ANSYS or similar tools. Security clearance eligibility is required, with interim clearance prior to start.