2026 ADGE Sr Principal Mech Engineer (On-Site)

Company: Raytheon
Location: Bellville
Posted on: January 28, 2026

Job Description:

Date Posted: 2025-12-23 Country: United States of America Location: MA131: Tewksbury, MA Bldg 1 Assabet 50 Apple Hill Drive Assabet - Building 1, Tewksbury, MA, 01876 USA Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required.? U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Security Clearance: DoD Clearance: SecretTitle: ADGE Sr Principal Mechanical Engineer (On-Site)Job Description:The Air Defense Ground Equipment Mechanical Design Department is responsible for the mechanical design, development, and integration of platform systems. This includes radar and communications shelter systems, electronic subsystems, launchers, hardware integration, and interconnects.We are seeking a motivated and driven Senior Principal Mechanical Engineer to join our Ground Equipment Design Team. The ideal candidate will bring technical expertise and hands-on experience in mechanical hardware design, system integration, program execution, and production support.Role is an On-Site role in Tewksbury or Andover, MAKey Responsibilities: Lead execution of major programs within the department, including shelter mechanical design, electronic equipment integration, end-item development, vendor coordination, and the integration of power and cooling systems. Support ongoing sustainment of existing product lines. Support and lead cross-functional engineering teams, delivering solutions and services across all phases of the program lifecycle. This may include development of next-generation sensing technologies, enhancements to current products, transition to production, in-field upgrades, and vendor oversight. Lead and contribute to proposal efforts and Estimate at Completion (EAC) activities, providing strategic and technical input. Serve as a Subject Matter Expert (SME) across multiple programs, providing critical and timely support to ensure successful execution and delivery. Responsibilities include, but are not limited to: Serve as a technical liaison to programs and Integrated Product Teams (IPTs), ensuring alignment across stakeholders. Oversee the technical performance of the design team, providing engineering guidance and project support throughout the entire product lifecycle. Support and lead Technical Data Package (TDP) development and conduct/oversee thorough peer reviews. Drive Hardware Engineering organization initiatives aimed at improving team productivity, technical execution, and overall efficiency. Lead mid- to large-sized cross-functional engineering teams as the technical execution lead across all development phases—from proposal generation and program start-up through requirements allocation, preliminary and detailed design, and into first article production. Perform complex mechanical design, development, and documentation of components, subassemblies, and major end items for defense system applications, ensuring compliance with system requirements. Provide product integration support for both domestic and international factories and suppliers. Collaborate with multidisciplinary engineering teams, non-technical stakeholders, and suppliers to develop robust design solutions and resolve technical challenges in support of production and delivery milestones. Manage and meet schedule, cost, and technical performance commitments for assigned tasks and projects. Apply deep knowledge of hardware engineering best practices to ensure technical excellence. The ability to partner effectively with Chief Engineers and technical leads is essential. Required Qualifications: 12 years of experience in a Mechanical Engineering role, including a minimum of 8 years focused on the design and development of mechanical equipment—preferably in military or defense environments. Demonstrated experience leading engineering teams, with accountability for cost, schedule, and technical performance, along with project management experience in both budgeting and scheduling. Proven ability to collaborate effectively in an Integrated Product Team (IPT) environment, working across multiple engineering disciplines as well as with Operations, Supply Chain, Quality, IPT leadership, Program Management, and customers. Hands-on mechanical design experience, including: Performing trade studies Developing concepts through detailed design Supporting transition to production Providing ongoing production and supplier support Experience in executing Root Cause and Corrective Action (RCCA) analyses, driving cost reduction initiatives, and producing engineering white papers or technical documentation. Broad expertise in mechanical design, development, material selection, and manufacturing processes, with proficiency in CAD tools and associated Product Data Management (PDM) systems. Willingness and ability to travel domestically and internationally as required. Desired Qualifications: Master of Science (MS) in Mechanical Engineering. Excellent communication, technical writing, presentation, and interpersonal skills. Working knowledge of military and commercial specifications and standards. Hands-on experience in the design, fabrication, and integration of: Electronic assemblies Shelter assemblies Power distribution equipment Rack-mounted systems Interconnects, Cables, and Harness systems Familiarity with Agile product development methodologies. Strong analytical and advanced problem-solving skills. Proficiency in Microsoft Office Suite, including Word, Excel, PowerPoint, and Project. Experience with modern manufacturing systems and processes. Background in reliability engineering and failure analysis. Demonstrated ability to work effectively with cross-functional teams and achieve results with minimal conflict, while maintaining schedule and budget adherence. Recognized team player and self-motivated leader with strong collaboration skills. Proven team leadership experience, including leading multi-disciplinary technical teams and the ability to develop, empower, motivate, and monitor performance. Demonstrated capability to develop technical solutions to complex system requirements. Experience managing engineering budgets using Earned Value Management Systems (EVMS) and the Estimate at Completion (EAC) process. Prior experience leading or contributing to proposal development. Familiarity with Risk and Opportunity Management practices. Education Required:Bachelor’s degree in Mechanical Engineering or related technical discipline (required).Advanced degree preferred.Security Clearance Requirement:U.S. Citizenship is required.Ability to obtain and maintain a U.S. Secret Security Clearance.RTX Corporation is an Aerospace and Defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry-leading businesses – Collins Aerospace Systems, Pratt & Whitney, and Raytheon. Its 185,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, VA. As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote. The salary range for this role is 124,000 USD - 250,000 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills.Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term disability, long-term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, Employee Scholar Program, parental leave, paid time off, and holidays. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement.Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company’s performance.This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply.RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window. RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act. Privacy Policy and Terms: Click on this link to read the Policy and Terms

Keywords: Raytheon, Missouri City , 2026 ADGE Sr Principal Mech Engineer (On-Site), Engineering , Bellville, Texas