Principal Mechanical Engineer - EO/IR Subsystems Engineer

Prattwhitney; El Segundo (CA); On-site; USD 118,000 - 225,000; Full time

Benefits offered by this job

Medical benefits

Dental benefits

Vision benefits

401(k) match

Paid time off

Job summary

Raytheon’s Airborne Radar Design department in El Segundo, CA seeks a Principal Mechanical Engineer for the Radar Antenna Design II section. You will lead electronics packaging design for airborne radar subsystems and oversee mechanical support across the hardware life cycle from concept to production, including heat exchangers, RF assemblies, and power supplies.

Responsibilities include leading design trades, producing data packs, and coordinating with suppliers.

Qualifications

• Typically requires a Bachelor’s in Science, Technology, Engineering, or Mathematics (STEM) degree or a minimum of 7 years’ prior relevant experience, to include any combination of the following: Experience with ANSI drawing standards.
• Experience with GD&T (Geometric Dimensioning & Tolerances).
• Experience with electronic packaging for Airborne applications.

Responsibilities

• Provide technical support on major programs and interface with Lead Mechanical Engineers and Chief Engineers to support design objectives.
• Lead smaller project teams through design development, ensuring that established procedures are followed in the creation of technical data packages while meeting all program design objectives.
• Work from requirements to develop unit design concepts and perform design trades.
• Be responsible for developing technical solutions to a wide range of complex problems.
• Complete detailed layouts and design documentation using Computer Aided Design tools.
• Provide support to suppliers who fabricate components and assemblies.
• Understand Engineering Change Release process and work within the company provided Product Data Management (PDM) system.
• Be a Responsible Engineering Authority (REA) for a subsystem for program assignment.

Skills

ANSI drawing standards

GD&T

Electronic packaging

Education

Bachelor's in STEM or equivalent

Tools

CREO

Job description

Date Posted: 2026-09-03 Country: United States of America Location: US-CA-EL SEGUNDO-R01 ~ 2000 E Imperial Hwy ~ BLDG R01 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: U.S. citizenship is required, as only U.S. citizens are authorized to access information under this program/contract. Security Clearance Type: DoD Security Clearance Status: Not Required

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 Airborne Radar Design department is currently seeking a Principal Mechanical Engineer for the Radar Antenna Design II section in El Segundo, CA. The person in this position will be involved in electronics packaging design for Airborne Radar Subsystems including Antenna, Receiver, Exciter, Processor and Power Supply subsystems. Tasks will include mechanical engineering support through the hardware life cycle, including concept development, preliminary and detail design, integration and test, transition to production, production support and installation. Typical technologies include electronic enclosures, heat exchangers including coldwalls, machined components, RF microwave assemblies, wiring, connectors, and power supplies. Constraints will include size, weight, power, design to cost, design for manufacture, and compressed project schedules.

What You Will Do:

• Provide technical support on major programs and interface with Lead Mechanical Engineers and Chief Engineers to support design objectives.
• Lead smaller project teams through design development, ensuring that established procedures are followed in the creation of technical data packages while meeting all program design objectives.
• Work from requirements to develop unit design concepts and perform design trades.
• Be responsible for developing technical solutions to a wide range of complex problems.
• Complete detailed layouts and design documentation using Computer Aided Design tools.
• Provide support to suppliers who fabricate components and assemblies.
• Understand Engineering Change Release process and work within the company provided Product Data Management (PDM) system.
• Be a Responsible Engineering Authority (REA) for a subsystem for program assignment.

Qualifications You Must Have:

• Typically requires a Bachelor’s in Science, Technology, Engineering, or Mathematics (STEM) degree or a minimum of 7 years’ prior relevant experience, to include any combination of the following: Experience with ANSI drawing standards. Experience with GD&T (Geometric Dimensioning & Tolerances). Experience with electronic packaging for Airborne applications.

Qualifications We Prefer:

• Design experience in high-frequency environments, enclosure design, EMI shielding, and thermal management.
• High proficiency with CREO or similar 3D solid modeling software.
• Proficiency in RF principles, RF circuit card design, RF materials, manufacturing and producibility.
• Experience with Antenna, Receiver, Exciter, or Processor mechanical design.
• Exposure to manufacturing processes for CCAs, metal housings, and brazements, or experience in a manufacturing and assembly support role.
• Advanced degree in Mechanical or Aerospace Engineering.
• Prior experience in Defense or Aerospace.
• Active security clearance.

The salary range for this role is 118,300 USD - 224,900 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 RTX 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, Pratt & Whitney, and Raytheon. Its 195,000 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, Virginia.