Entry Level R&D Mechanical Engineer Jobs in Irvine, CA

Date Posted:

2026-07-29

Country:

United States of America

Location:

US-CA-FULLERTON-675 ~ 1801 Hughes Dr ~ BLDG 675

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. 

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 Product Team role will support the Sentinel radar product line based in Fullerton, CA and may require domestic and international travel to suppliers.

This position will be an onsite role.

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 equivalent.
• Develop preliminary sketches, diagrams, and other engineering information to generate 3-D design models and/or conceptual designs
• Exposure to solid modeling practices and drawing creation using CAD tools such as Creo Parametric, Solidworks, or equivalent.
• Provide Mechanical Engineering solutions on production issues to functional leadership and engagement for resources (Subject Matter Experts, etc.) to resolve production issues rapidly and efficiently.
• Collaborate with 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 execution.
• Provide radar technical data package (TDP) support that includes design, development, manufacturing, and failure investigation solutions

Qualifications You Must Have  

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 2 years of prior relevant experience or an Advanced Degree.
• Demonstrated mechanical engineering design knowledge.
• Exposure to product lifecycle stages of a radar production program.
• Experience resolving technical challenges.
• Position requires a minimum of 25% of travel to suppliers and production facilities which include domestic and international travel.

Qualifications We Prefer 

• Advanced degree in mechanical engineering, manufacturing engineering, or hardware system design.
• Experience working in a factory supporting full-rate production of radar components and assemblies.
• Experience working with suppliers that manufacture machined parts, panels, and electronics.
• Experience in manufacturing and tolerancing radar mechanical systems.
• Experience with ANSI/ASME Y14.5 GD&T (Geometric Dimension and Tolerances).
• Must possess strong CAD, technical writing and oral communication skills.

What We Offer

• Our 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.
• Relocation Eligibility

Learn More & Apply Now!

• Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products.

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 75,800 USD - 144,200 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.

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