Network Engineer, Principal Specialist, El Segundo, CA Onsite

RTX; El Segundo (CA); On-site; USD 120,000 - 160,000; Full time

Job summary

RTX in El Segundo, CA is seeking a Principal Network Specialist to maintain and enhance government-classified voice and data networks onsite. The role requires active US Secret/transferable clearance, 5+ years of relevant experience, and strong Cisco routing/switching capabilities.

The successful candidate will document network details, advance security posture, and coordinate with vendors and program engineers to ensure uptime and compliance across defense-oriented programs.

Qualifications

• University degree or equivalent experience; 5+ years or an advanced degree with 3+ years.
• Experience configuring and troubleshooting Cisco routers, switches, firewalls, and IDS, including software upgrades.
• Active, in-scope and transferable U.S. government issued security clearance; U.S. citizenship required.

Responsibilities

• Focuses on inter-team communication and documentation of network details to support project growth.
• Experience with Cisco ISE, 802.1X, SolarWinds, and client/server environments for government networks.
• Maintains smooth operation of voice and data networks; plans and performs installation and reconfiguration of hardware/software for data/voice networks.
• Develops expertise in network hardware/software interconnection and interfacing (switches, routers, firewalls, authentication servers, encryptors).
• Maintains network management software platforms.
• Proposes solutions to management to optimize cost savings with redundancy and uptime.
• Creates or updates network documentation and diagrams.
• Provides network analysis and planning for in-house systems.
• Coordinates third-party maintenance and vendor support as needed.
• Designs networks with hardware/software selections and hierarchical architecture.
• Works with program engineers to resolve networking problems in tactical environments.
• Mentors and trains the technical team; supports knowledge sharing.
• Willing to work outside normal hours as needed.

Tools

Cisco routers

Switches

Firewalls

Intrusion detection systems

Job description

Date Posted: 2026-10-28
Country: United States of America
Location: US-CA-EL SEGUNDO-E04 ~ 2006 E El Segundo Blvd ~ BLDG E04
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: Secret - Current
Security Clearance Status: Active and existing security clearance required on day 1
Network Engineer, Principal Specialist
Raytheon Digital Technology - Classified Information Services
El Segundo, CA - ONSITE position
Active US Secret Clearance required

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:

• Focuses on Inter-team communication and organization of clear documentation of network details to support and enable smooth project growth.
• We ideally need someone with Cisco ISE experience with 802.1X, SolarWinds, and setting up client server environments for government networks.
• Maintains smooth operation of voice and data networks. Plans, evaluates, coordinates, and performs installation and/or reconfiguration of hardware and software elements of data and/or voice communication network.
• Develop technical expertise in all areas of voice and data networks hardware and software interconnection and interfacing, such as switches, routers, firewalls, authentication servers, encryptors etc.
• Maintains network management software platforms.
• Propose solutions to management to ensure all communications requirements based on future needs and current usage, configuring such solutions to optimize cost savings aligning with future requirements factoring in redundancy and required network uptime.
• Prepares or ensures that appropriate network documentation exists, including operational instructions, technical diagrams, and other documentation. Where no documentation exists, new documentation will be created.
• Provide regular monitoring and network analysis regarding short- and long-range planning for in-house systems.
• Assist with coordination of third-party maintenance for network equipment or with vendors for third-party support.
• Network designs that include selection of hardware and software packages, hierarchical architecture, and geographical limitations.
• Work with program engineers to resolve networking problems in tactical environments.
• Assist in the overall performance and capability of technical team through mentoring, training, and knowledge sharing.
• Willingness and availability to work outside normal business hours (evenings and weekends) as needed.
• Must be able to work with general supervision and follow established procedures.

What You Will Learn:

• You will apply your Network Engineering skills to defense-oriented programs.
• Obtain Certifications in Security+ within 6 months and Cisco Certified Network Associate (CCNA) is highly desired within a year.

Qualifications You Must Have:

• Typically requires a University Degree or equivalent experience and minimum 5 years prior relevant experience, or An Advanced Degree in a related field and minimum 3 years' experience
• Experience in configuration and troubleshooting of Cisco routers, switches, firewalls, and/or intrusion detection systems, including software upgrades.
• Active, In-Scope and transferable U.S. government issued security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citi