Mechanical Engineer I (Onsite)

Date Posted:2026-06-08 Country:United States of AmericaLocation:US-CA-FULLERTON-675 ~ 1801 Hughes Dr ~ BLDG 675Position Role Type:OnsiteU.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 clearanceSecurity Clearance Type: DoD Clearance: SecretSecurity Clearance Status: Active and existing security clearance required after day 1Are you ready to explore the world of aerospace and defense? Do you want to learn from and collaborate with some of the greatest minds in the industry? At RTX, our internships, co-ops and full-time careers provide an exceptional foundation to work on complex problems, advance your skills and create a safer, more connected world. Discover opportunities to make a difference at RTX.At RTX, the world largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world. Raytheon brings 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. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.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. The Tactical Radars and Effectors department within Raytheon Hardware Engineering supports the development, production, and deployment of multiple defense products including radars, missiles, command and control systems, and naval electronics.  The products support US Government and international customers.This Mechanical Engineer I will support the Sentinel radar product line and sensors based in Fullerton, CA and may require domestic and international travel to suppliers.  This position will be an onsite role; Employees who are working in Onsite roles will work primarily onsite.What You Will Do:Working within a team environment to develop innovative mechanical subsystems with solid modeling practices and drawing creation using CAD tools such as Creo Parametric, Solidworks, or equivalentDevelop preliminary sketches, diagrams, and other engineering information to generate 3-D design models and/or conceptual designsExposure to solid modeling practices and drawing creation using CAD tools such as Creo Parametric, Solidworks, or equivalentKnowledge of fabrication processes, capabilities and limitationsSupport Mechanical Engineering solutions on production issues to functional leadership and engagement for resources (Subject Matter Experts, etc.) to resolve production issues rapidly and efficientlySupport functional team leads for the integration efforts across the Cross Product Teams in the Sentinel portfolio to ensure successful system design, integration, production and program executionWhat You Will Learn:Understanding of and disciplined application of tools / processes / approaches / instructions across the radar product life cycleProvide radar technical data package (TDP) support that includes design, development, manufacturing, and failure investigation solutionsParticipant in the Engineering changes process, peer review process, Engineering Documentation Standards (EDS) implementation, Configuration Control Board (CCB) participant as required by RTX command mediaSupports program growth and technology insertion strategies working closely with the functional leaders, program technical leadership, and Program Office.Supports Mechanical leads for planning and execution of production programs, lateral product applications, and Engineering Changes.Qualifications You Must Have:Bachelor’s degree in science, Technology, Engineering, and Mathematics (STEM)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 clearanceDemonstrated mechanical engineering design knowledgeExposure to product lifecycle stages of a radar production programExperience resolving technical challengesPosition requires a minimum of 25% of travel to suppliers and production facilities which include domestic and international travel.Qualifications We Prefer:Degree in mechanical engineering, manufacturing engineering, or hardware system design.Willing to work in a factory supporting full-rate production of sensors, radar components and assemblies.Willing to work remotely with suppliers that manufacture machined parts, panels, and electronics.Exposure to manufacturing and tolerancing mechanisms.Exposure to ANSI/ASME Y14.5 GD&T (Geometric Dimension and Tolerances).Strong CAD, technical writing and oral communication skills.What We OfferOur values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Trust, Respect, Accountability, Collaboration, and Innovation.Learn More & Apply Now!Please ensure the role type defined below is appropriate for your needs before applying to this role. This position is classified as:Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the devel