Senior Specialist, System Administrator (TS/SCI)

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: Senior Specialist, Cyber Infrastructure Systems Engineer (Systems Administrator)

Job Code: 47239

Job Location: Schriever Space Force Base, CO

Job Schedule: 5/8 - Employees work 8 hours per day, 5 days a week

Job Description:

L3Harris, a premier provider of Space Domain Awareness (SDA) mission solutions for the United States Space Force, is seeking a Sr. Specialist Systems Engineer / Platform Engineer to support system sustainment for the MOSSAIC C2 SDA mission and its Space Mission Platform at Schriever Space Force Base, CO. The selected candidate will support and maintain enterprise infrastructure across hybrid and private cloud environments, with responsibilities that include administering Red Hat Enterprise Linux and Windows systems, supporting VMware Cloud Foundation (VCF), automating operations with Ansible, and maintaining Kubernetes-based container platforms. This role is suited for a skilled infrastructure professional with strong troubleshooting abilities, a focus on automation and operational excellence, and experience working in a Scaled Agile Framework (SAFe) environment.

Essential Functions:

Experience administering, maintaining, and troubleshooting Red Hat Enterprise Linux and Windows operating systems in a production enterprise environment, including system configuration, patching, performance tuning, and issue resolution.

Hands-on experience supporting virtualized infrastructure using VMware Cloud Foundation (VCF), version 9 and above.

Experience using Ansible to automate system administration tasks, configuration management, application deployments, patching, and repeatable infrastructure support activities, with working knowledge of Kubernetes architecture and experience supporting containerized applications, cluster operations, workload deployments, platform troubleshooting, and VMware Cloud Foundation (VCF) automation and operations across private cloud environments.

Scripting skills in Python, Bash, or PowerShell for automation and analysis.

Experience operating within a Scaled Agile Framework (SAFe) Agile framework, including participation in team ceremonies, sprint planning, backlog refinement, and delivery of work in an iterative development environment.

Qualifications:

Bachelor’s Degree with a minimum of 6 years of relevant experience, or Graduate Degree with a minimum of 4 years of relevant experience, or in lieu of a degree, a minimum of 10 years of prior related experience.

Clearance: Top Secret SCI. CI Poly preferred.

DoD 8570.01-M IAT Level 2 Required Professional Certifications: Security+ CE, or higher certification

Preferred Additional Skills:

Additional certifications such as Red Hat Certified System Administrator (RHCSA), Network+, or VMware, Microsoft, or other relevant infrastructure and systems certifications.

Proficiency with endpoint management, detection and response (EDR) tools such as McAfee ePolicy Orchestrator (ePO)

Experience authoring detection logic in SIEM platforms and developing automated responses using SOAR tools.

Familiarity with ACAS, Nessus, and OpenVAS for vulnerability management.

Experience with Palo Alto and Juniper network appliances

Working knowledge of RMF, POA&M processes, and compliance reporting.

In compliance with pay transparency requirements, the salary range for this role in Colorado state is $92,500-$171,500. 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.

The application window for this position will close on 12/15/2026.

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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.

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