Sr. Specialist Cyber Infrastructure Engineer

Overview

L3

Harris 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. L3

Harris 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. L3

Harris Technologies is the Trusted Disruptor in the defense industry. 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: Sr. Specialist, Cyber Infrastructure Engineer

Job Code: 29132

Job Location: Carlsbad, CA

Job Schedule: 9/80 — Employees work 9 out of every 14 days – totaling 80 hours and have every other Friday off

Job Description: L3

Harris is seeking a highly skilled Cyber Infrastructure Engineer to join our Carlsbad, CA team. This role requires proven expertise across Ubuntu, Red Hat, and Windows environments, enterprise networking (Cisco, Juniper), and hands-on experience supporting classified and air-gapped systems. The engineer will design, implement, and secure infrastructure aligned with DoD Collateral requirements, DISA STIGs, NIST RMF, and FIPS compliance standards while enabling mission-critical operations.

• Engineer and oversee administration of Linux (Ubuntu/Red Hat) and Windows Server enterprise environments, ensuring mission-critical uptime and compliance in classified domains.
• Architect, configure, and direct operations of Cisco and Juniper networking equipment within classified/air-gapped networks, ensuring strict adherence to 32 CFR Part 117 (NISPOM), DAAPM, JSIG, NIST standards, and CCRI readiness.
• Lead the design, deployment, and optimization of VMware ESXi infrastructures, including migrations from bare metal to virtualized environments.
• Manage and safeguard Net App storage solutions, ensuring data integrity, continuity of operations, and secure handling of classified data.
• Implement and govern enterprise Splunk platforms for centralized logging, monitoring, and compliance reporting, aligning outputs with DCSA and DoD audit requirements.
• Oversee audit and incident response by reviewing electronic and manual logs, investigating anomalies, and directing remediation of identified security incidents.
• Conduct and validate enterprise vulnerability management through Nessus scanning, application of DISA STIGs, and enforcement of FIPS-validated cryptography.
• Direct enterprise endpoint management leveraging Ivanti for patch automation, compliance enforcement, and lifecycle sustainment of systems.
• Lead NIST RMF activities by authoring and reviewing accreditation documentation, validating technical controls, and in preparation for DCSA audits.
• Provide Tier III support for escalated issues and lead troubleshooting efforts.
• Collaborate with senior security leadership (ISSM, FSO, Program Managers) to ensure continuous system compliance and readiness for government assessment.
• Maintain eligibility and clearance standards by holding a current Secret clearance with the ability to obtain Top Secret post-hire.

• Bachelor’s degree in Computer Science, Information Systems, Cybersecurity, or related discipline; advanced degree or equivalent senior-level experience strongly preferred.
• Active Secret clearance required; ability to obtain and maintain a Top Secret / SCI clearance post-hire.

• Minimum of 10 years of progressive IT and security experience, with a proven record in systems administration, cybersecurity engineering, and secure infrastructure management.
• Extensive expertise in applying the RMF, NIST SP 800-53 controls, and compliance with DCSA/DAAPM and related DoD standards.
• Deep technical proficiency with Linux (Ubuntu/Red Hat) and Windows Server operating systems, including hardening, patching, and performance optimization in classified environments.
• Proven leadership in architecting, deploying, and…