SD&I - Sr. Principal Mechanical Engineer

Date Posted:

2026-01-29

Country:

United States of America

Location:

US-MA-MARLBOROUGH-MA1 ~ 1001 Boston Post Rd ~ BLDG 1

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 Type:

DoD Clearance: Secret

Security Clearance Status:

Active and existing security clearance required after day 1

At Raytheon, the foundation of everything we do is rooted in our values and a higher calling – to help our nation and allies defend freedoms and deter aggression. We bring the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today’s mission and stay ahead of tomorrow’s threat. Our team solves tough, meaningful problems that create a safer, more secure world. 

Raytheon Mechanical Engineering (ME) is the premier organization for mechanical hardware design, development, production, and research.  ME strives to minimize total systems cost, while maximizing production. This is achieved through commitment, training and continuous improvement using common tools and processes. The capabilities encompass a broad range of technical disciplines which include engineering, operations, technical services, materials and processes, analysis and test and documentation.  

The Mechanical Engineering Department is seeking a Senior Principal Mechanical Engineer to provide Site Development and Integration (SD&I) expertise.  The Site Development & Integration section performs large scale, complex site development and onsite support. Engineers will perform research, design, support construction and development of military and commercial facilities.

The position is for the Marlborough, Massachusetts location.  This position is an onsite role.

What You Will Do

Provide technical leadership to site construction projects in support of USG and Foreign military customer product installations.

Drive technical requirements for site construction to programs and contractors across multiple programs.

Provide technical oversight to internal team and contractors during site construction and integration.

Identify and manage risks and opportunities and associated mitigation and capture plans as they relate to the site activation.

Responsible for new business proposal’s site development and integration scope, ensuring proposals have a robust technical baseline and address risk and opportunities. 

Support site surveys for facility infrastructure solutions.

Develop facility requirements and design development documents for defense system equipment in accordance with system requirements.

Work with Architect/Engineering (A/E) contractors for facility design effort.

Review and approve shop drawings and construction specifications.

Collaborate and coordinate work activities with Raytheon, Government, and subcontractors.

Basic knowledge of DOD codes and standards, including Unified Facility Codes (UFC’s) for site installations.

Travel is expected to be 20% both domestically and internationally.  Travel could include multiple week duration trips.

Qualifications You Must Have

Bachelors degree from an ABET accredited University and has passed the fundamentals of Engineering Exam (EIT/FE) plus ten (10) years of related experience or demonstrated equivalency of experience and/or education.

Familiar with the use of drafting software including Revit and AutoCAD.

Familiarity with building codes for commercial, industrial and military/Department of Defense (DoD) facilities.

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.

Qualifications We Prefer

Experience working with and developing Facility Requirement Documents.

Comfortable working in a high energy environment with multiple concurrent and quick-turn deadlines.

Willingness to learn and desire to overcome challenges to achieve individual and team success.

Strong written and oral communication.

Strong attention to detail and orientation to produce high quality work products.

Capable of using spreadsheet, word processing and standard Microsoft software.

Ability to work with and collaborate with a multi-disciplinary team.

RTX Corporation is an Aerospace and Defense company that provides advanced systems and services for commercial, military and government customers worldwid