Principal Cyber Network Engineer

RTX (Raytheon); Anaheim (CA); On-site; USD 140,000 - 190,000; Full time

Job summary

Applied Signal Technology in Anaheim Hills, CA, is seeking a Principal Software Engineer with a strong background in cybersecurity and networking who strives for excellence and enjoys team collaboration on system development to strengthen our nation.

You will design, code, test, and deploy software for high-assurance applications, coordinate with project managers and engineering teams, and travel up to 25% to support field deployments, with TS/SCI and U.S. citizenship required.

Qualifications

• Degree in Science, Technology, Engineering or Mathematics (STEM) with 8+ years of experience.
• 8+ years of experience developing in C, C++, Python, and/or Rust.
• Experience with system-level integration and testing of advanced processing systems.
• Experience with cybersecurity tools and/or controls.
• Active and transferable TS/SCI security clearance and U.S. citizenship required.

Responsibilities

• Develop software for system development and deployments to protect our country.
• Design, code, test, and document software solutions.
• Collaborate with project managers and other engineers within Engineering.
• Travel up to 25% as needed.

Skills

C/C++

Python

Rust

System integration

Algorithms

Cybersecurity tools

Clearance TS/SCI

Linux

Team collaboration

Communication

Education

STEM degree

Tools

APIs

Networking

Job description

Date Posted: 2026-10-30

Country: United States of America

Location: US-CA-ANAHEIM-406 ~ 160 N Riverview Dr ~ BLDG 406, Ste 150

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: TS/SCI - Current

Security Clearance Status: Active and existing security clearance required on day 1

Raytheon Company managed by Collins Aerospace

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.

Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense.

Applied Signal Technology (AST) is seeking a Principal Software Engineer with a strong background in cybersecurity and networking who strives for excellence and have a passion to be part of a team that strengthens our nation and improves the security of our world. AST provides trusted strategic and tactical SIGINT solutions that secure the interests of the U.S. and its partners. AST's work in areas such as high-capacity broadband communications, signal processing and analysis, tactical SIGINT, and wireless communications continually challenges our extraordinary engineers to resolve problems and make the world a safer place. AST's work environment is dynamic, highly collaborative and provides engineers the freedom to strengthen and expand their skills, explore new and creative ideas, and work closely with our nation's finest service members all while embracing integrity, innovation and work-life balance.

This is an ONSITE position located at our Anaheim Hills, CA location.

Applied Signal Technology: WHO WE ARE

What You Will Do:

• You will work with other experienced members in R&D on system development and deployments for the protection of our country
• Participate in the requirements, design, development and testing of software to include development of new work products or enhancement of existing applications and systems
• Design, code, test, integrate, and document software solutions
• Participate in internal review of software components and systems
• Generate briefings and present material to team members, customers, and AST management as necessary
• Collaborate with project managers and other professionals within Engineering
• Follow established development practices and processes to maintain the configuration management of software products
• Travel up to 25%

Qualifications You Must Have:

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 8 years of prior relevant experience
• Typically requires a minimum of 8 years of experience developing in C, C++, Python, and/or Rust
• Experience with system-level integration and testing, specifically, the integration of advanced, custom processing systems, testbeds, and software
• Experience developing, coding, testing, and debugging complex algorithms
• Experience working with customers, end users, hardware design teams, and software design teams
• Experience with developing software for APIs, networking, and backend
• Experience with creating proof-of-concept (PoC) use case scenarios and prototypes from initial ideas
• Strong written and verbal communication skills and the ability to work independently yet collaboratively in a team environment
• Experience in implementing cybersecurity tools and/or controls
• Experience developing system level designs, high level control and data interfaces
• Active and transferrable U.S. government issued Top Secret SCI (TS/SCI) security clearance is required prior to start.
• U.S citizenship is required, as only U.S. citizens are eligible for a security clearance

Qualifications We Prefer:

• Experience developing in C/C++ within a Linux environment
• Experience with cybersecurity concepts such as red/blue teaming, defense-in-depth, and/or network penetration
• Experience with building networks and networking protocols
• Experience with reverse engineering software and/or hardware
• Experience with Design, Development, Integration and Test of complex Communication systems
• Experience in developing proof-of-concept (PoC) use case scenarios for novel cybersecurity systems
• Experience formalizing, developing and documenting requirements, plans, and