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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 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 worked – and have every other Friday off

Job Description:

L3Harris 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.

Essential Functions:

• 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 NetApp 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

Qualifications:

• 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.

Preferred Skills\Qualifications:

• 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 Risk Management Framework (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 securing enterprise network infrastructures, with strong understanding of Cisco, Juniper, and cross-domain networking protocols.
• Expert-level knowledge of virtualization (VMware ESXi, Hyper-V) and containerization technologies, including secure deployment within mission-critical systems.
• Experience with virtualization technologies and containerization.
• Familiarity with the Risk Management Framework and its application in securing IT systems.
• Superior communication, documentation, and stakeholder engagement skills, with the ability to brief senior leadership, government assessors, and cross-functional teams.
• Proven ability to operate independently while mentoring and collaborating across technical and security teams to achieve enterprise-wide objectives.
• Advanced proficiency with enterprise security and compliance tools including ACAS (Nessus), STIGViewer, SCAP, and Splunk, with the ability to analyze outputs and drive remediation.
• Extensive background as a Linux System Administrator in secure, classified environments, with expertise in hardening, automation, and lifecycle sustainment.
• Comprehensive knowledge of federal and defense cybersecurity requirements, including NISPOM, DAAPM, JSIG, ICDs, and associated compliance frameworks.
• Industry-recognized certifications such as CISSP, RHCSE, or equivalent senior-level credentials.

In compliance with pay transparency requirements, the salary range for this role in California, Massachusetts, New Jersey, Washington, and the Greater D.C, Denver, or NYC areas is $104,500-$193,500. This is not a guarantee of compensation or salary, as final offer amount may vary based on factors including but not limited to experience and geographic location. L3Harris also offers a variety of benefits, including health and disability insurance, 401(k) match, flexible spending accounts, EAP, education assistance, parental leave, paid time off, and company-paid holidays. The specific programs and options available to an employee may vary depending on date of hire, schedule type, and the applicability of collective bargaining agreements.

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L3Harris Technologies is proud to be an Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug-free workplace and performs pre-employment substance abuse testing and background checks, where permitted by law.

Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information.

By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions.

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