Senior Information Systems Engineer - Onsite El Segundo, CA

globalhr; El Segundo (CA); On-site; USD 96,000 - 182,000; Full time

Job summary

RTX in El Segundo, CA is seeking a cybersecurity engineer to provide compliance guidance for production and procurement of test equipment (TE). This onsite role requires U.S. citizenship and a active DoD Secret clearance day one.

You will develop cybersecurity compliant TE across Linux, iOS and Windows, install software, troubleshoot, and collaborate with Digital Technologies and Cybersecurity to ensure test integrity and network containment.

Qualifications

• Bachelor’s Degree in Science, Technology, Engineering, or Mathematics (STEM).
• Minimum 3 years of Linux systems administration experience if advanced STEM degree.
• Experience with TCP/IP, DNS, DHCP, routing or firewalls like iptables.

Responsibilities

• Provide Cybersecurity guidance to engineering for TE production and procurement.
• Support Flight Test capabilities and processes for Raytheon test systems.
• Develop Cybersecurity Compliant TE (Linux, IOS, Windows).
• Install software packages/updates to TE operations and testing.
• Troubleshoot production and development TE to ensure connectivity, functionality, compliance, and test integrity.
• Collaborate with Digital Technologies to integrate TE into controlled networks or enterprises.
• Collaborate with Cybersecurity to ensure TE compliance using Nessus, Splunk, Ivanti.
• Collaborate with engineering to ensure changes do not affect TE availability or test integrity.

Job description

Date Posted: 2026-08-18

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: Active and transferable U.S. government issued security clearance is required prior to start date. 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 on day 1

At RTX, the world's 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.

What You Will Do

• Provide Cybersecurity compliance guidance to engineering for production and procurement of Test Equipment (TE)


• Support Flight Test capabilities and processes for Raytheon test systems


• Develop Cybersecurity Compliant TE (Linux, IOS, Windows)


• Install software packages/updates to enhance operations and testing of production hardware


• Troubleshoot production and development TE to ensure connectivity, functionality, compliance, and test integrity


• Collaborate with Digital Technologies to integrate TE into controlled networks or enterprises


• Collaborate with Cybersecurity to ensure TE compliance (using tools such as Nessus, Splunk, Ivanti, and locally procured software


• Collaborate with engineering to ensure changes do not affect the availability or test integrity on the TE


• Support all reviews required prior for implementation of any changes to the TE

This position is 100% ONSITE in El Segundo, California

Qualifications You Must Have

• Bachelor’s Degree in Science, Technology, Engineering, or Mathematics (STEM)


• Minimum of five (5) years of relevant experience OR an advanced degree in STEM and a minimum of 3 years relevant experience


• Minimum 3 years of Linux systems administration experience


• Networking fundamentals such as TCP/IP, DNS, DHCP, routing, and/or firewalls such as iptables/firewalld


• Package management such as yum/dnf, apt and/or repository management


• Experience with user account management, software installation and or technical customer support


• U.S. Citizen with current DoD Government issued Secret security clearance day one

Qualifications We Prefer

• Certifications: DoD 8570.01M IAT II certified credentials (Security+, CISM, etc.), or ability to obtain within 6 months of start


• Systems Engineering Experience: Systems Engineer managing Operational Technology (OT) experience and/or test systems in a production environment


• OS & Systems Administration: Experience with Windows and Linux (desktop and server), including networking administration and user/permissions management such as AD integration, sudo, SELinux/AppArmor basics


• Security & Hardening Practices: Experience with backup/recovery procedures, baseline hardening such as CIS benchmarks, STIGs, and vulnerability scanning tools such as Nessus, OpenSCAP


• Automation/Configuration Management: Experience with configuration management tools (e.g., Ansible), including writing and maintaining playbooks for patch management and routine configuration


• Troubleshooting & Communication: Troubleshooting skills across Windows/Linux systems, customer service orientation, and oral/written technical communication with independent problem-solving ability

What We Offer

Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Safety, Trust, Respect, Accountability, Collaboration, and Innovation.

This position offers relocation.

This position requires a security clearance. DCSA Consolidated Adjudication Services (DCSA CAS), an agency of the Department of Defense, handles and adjudicates the security clearance process. More information about Security Clearances can be found on the US Department of State government website here: https://www.state.gov/m/ds/clearances/c10978.htm

Location Information: El Segundo, CA: https://careers.rtx.com/global/en/raytheon-el-segundo-ca-location

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 95,500 USD - 181,700 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.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.