Mechanical Engineer I (Onsite)

RTX; El Segundo (CA); On-site; USD 63,000 - 120,000; Full time

Job summary

RTX is seeking a Mechanical Engineer for onsite work in El Segundo, CA. You will contribute to the design, analysis, and testing of mechanical and electromechanical systems, collaborating with cross-functional teams to optimize performance and cost.

The role requires a B.S. in Mechanical Engineering and hands-on CAD experience. You’ll work on a range of components from prototypes to production-ready solutions, with opportunities for growth in a dynamic aerospace and defense environment.

Qualifications

• Bachelor’s degree in Mechanical Engineering or STEM major available by start date.
• Experience using parametric 3D CAD to create 3D models and drawings.
• Hands-on mechanical design from coursework or projects.

Responsibilities

• Apply research to planning, design, development and testing of mechanical/electromechanical systems.
• Evaluate products for cost-effectiveness and performance, and modify designs to prevent malfunctions.
• Develop parts and sketches for machines and components, and support production orders.

Skills

Mechanical design

GD&T knowledge

Team collaboration

Education

Bachelor’s degree in Mechanical Engineering

Tools

SolidWorks

PTC Creo

Autodesk Inventor

CATIA

Siemens NX

Job description

Date Posted: 2026-11-05

Country: United States of America

Location: US-CA-EL SEGUNDO-E01 ~ 2000 E El Segundo Blvd ~ BLDG E01

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: None/Not Required

Security Clearance Status: Not Required

Are 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 Raytheon, the Space and Airborne, Power and Digital (SAPD) department consists of more than 150 engineers working collaboratively with internal and external customers and programs to provide innovative solutions for controlling product motion, including space and air launched vehicles used by a variety of end users who depend on the quality and integrity of our systems. Our systems include electronic processing units, harnessing design, and other components for interfacing with the vehicle and packaging the control assemblies. Due to the highly cross‑functional nature of these systems, we are constantly looking for talented engineers with a sub‑system solution mindset.

What You Will Do:

Apply research to the planning, design, development, and testing of mechanical and/or electromechanical systems, instruments, controls, engines, and/or machines. Evaluate and analyze various mechanical products to determine their cost‑effectiveness and efficiency while also examining field installations and recommending design modifications to eliminate malfunctions. Participate in product development activities, executes tests, and produces parts, designs, or sketches, following all appropriate Mechanical Engineering design, safety, and qualification standards. Test models of alternate designs and processing methods to assess operating condition effects. Produce parts, designs, or sketches for machines, components, systems or work orders / purchase requests.

Qualifications You Must Have:

• Bachelor’s degree in Mechanical Engineering or related Science, Technology, Engineering, or Mathematics (STEM) major obtained by start date.
• Experience utilizing parametric 3D CAD software (such as SolidWorks, PTC Creo, Autodesk Inventor, CATIA, or Siemens NX) to generate 3D solid models, mechanical assemblies, and detailed 2D engineering drawings.
• Experience in mechanical design applied through coursework, academic research, engineering competition teams (e.g., Formula SAE, Baja, Robotics), or hands‑on projects.

Qualifications We Prefer:

• Bachelor’s degree in Mechanical Engineering or Aerospace Engineering.
• Cumulative GPA of 3.0 or higher from an ABET‑accredited institution.
• Knowledge or application of Geometric Dimensioning & Tolerancing (GD&T) principles per ASME/ANSI Y14.5.
• Hands‑on experience in rapid prototyping and mechanical fabrication, including additive manufacturing (3D printing via FDM, SLA, or SLS) or machine shop equipment (mills, lathes, drill presses, or CNC equipment).
• Demonstrated problem‑solving aptitude applied to structural, thermal, or multi‑disciplinary hardware challenges.

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 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.

Relocation Eligibility:

Please consider the following role type definition as you apply for this role.

Salary:

The salary range for this role is 62,900 USD - 119,700 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.

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.

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.

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.

Equal Opportunity Employer:

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.

Company Overview:

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.