Principal Mechanical Engineer - EO/IR Subsystems Engineer

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

Benefits offered by this job

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

Holidays

Job summary

RTX is seeking a Principal Mechanical Engineer in El Segundo, CA, to design and package airborne radar subsystems including antenna, receiver, and power supplies. You will lead design trades, develop concepts from requirements, and create detailed CAD layouts while coordinating with suppliers and engineering teams.

The role requires a STEM degree and 7+ years of experience in electronic packaging for airborne applications, with CREO proficiency and an active security clearance preferred.

Qualifications

• Typically requires a Bachelor’s in Science, Technology, Engineering, or Mathematics (STEM) degree or minimum of 7 years’ prior relevant experience.
• Experience with ANSI drawing standards and GD&T is required or highly desirable.
• Experience with electronic packaging for airborne applications is preferred.

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 and ensure procedures are followed in data package creation.
• Develop unit design concepts from requirements and perform design trades.
• Create detailed layouts and design documentation using CAD tools and support suppliers.
• Understand Change Release processes and work within the Product Data Management system.
• Serve as a Responsible Engineering Authority for a subsystem.

Skills

ANSI drawing standards

GD&T

electronic packaging

Education

Bachelor's in STEM

Advanced degree in Mechanical or Aerospace Engineering

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 IIsection 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 aBachelor’s in Science, Technology, Engineering, or Mathematics (STEM)degreeora minimumof7 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.

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attendselect 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 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.

• 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
• 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.