Manager, Information Security Systems Engineering

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Manager, Information Security Systems Engineering  Job Number: 45969  Job Location: Yorba Linda, CA Job Schedule: 4/10: Employees work 10 hour shifts 4 days a week     Job Description:   The Manager of Information Security Systems Engineering leads a team of system and network administrators responsible for maintaining secure, accredited, and mission‑critical information systems that support the Range & Test Solutions (RTS) Annual Services Contract. This role oversees classified and isolated network environments, ensures compliance with Department of Defense cybersecurity standards, and drives continuous improvement across infrastructure, security operations, and service delivery. The manager partners closely with engineering, cybersecurity, and program leadership to ensure reliable, secure, and compliant technical operations across multiple systems.    Essential Functions:   Lead and manage a team of system administrators supporting multiple on‑site classified, accredited, and isolated network environments. Oversee system operations across Windows Server, Windows workstation environments, Red Hat Enterprise Linux (RHEL) servers, Active Directory, email platforms, endpoint security tools, backup systems, and network devices. Maintain compliance with Defense Counterintelligence and Security Agency (DCSA), Department of Defense (DoD) Cybersecurity Workforce requirements, National Institute of Standards and Technology (NIST) standards, and program‑specific security directives. Coordinate technical planning, system hardening, patching, and vulnerability management across RTS infrastructure. Support accreditation activities, incident handling processes, and preparation for customer security audits. Partner with program leadership to ensure secure, reliable system performance supporting mission deliverables. Manage hardware resources, network components, and hands‑on equipment that require on‑site support. Support proposal development by providing technical, cost and schedule inputs related to cybersecurity, system administration capabilities, staffing estimates, and infrastructure requirements. Perform Control Account Manager (CAM) responsibilities, including planning, tracking, and reporting cost and schedule performance using Earned Value Management (EVM) processes.  Travel up to 5% for program or technical coordination.

Active US Secret security clearance. Bachelor’s degree in Information Systems, Computer Science, Engineering, or related field, with a minimum of 9 years of experience, or a  Graduate Degree and a minimum of 7 years of prior related experience. In lieu of a degree, minimum of 13 years of prior related experience.   Preferred Additional Skills:   Compliance with DoD Cybersecurity Workforce certification requirements. Progressive experience in system administration, network operations, information security, and engineering leadership. Experience leading teams supporting classified environments and DoD governed technical processes. Experience with secure network architecture design and defense‑in‑depth implementations. Familiarity with accreditation packages, security control assessments, and Defense Counterintelligence and