Lead, Systems Administrator

L3Harris Technologies • Bellmead, TX

1d • Onsite

About The Position

The Information Security Systems Engineer 5 serves as the dedicated systems administrator for Waco’s secure, isolated lab and air-gap environments. The role provides on-site ownership of Linux and Windows infrastructure supporting multiple U.S. Government programs, engineering, and related mission work. The administrator provisions, secures, operates, troubleshoots, and documents systems and services while maintaining clear boundaries among Secure Area IT, program teams, and Industrial Security.

The position administers Red Hat-based Linux servers and workstations and Windows Server and workstations, and builds and maintains infrastructure services needed to support users and engineering teams in isolated environments. It supports secure development infrastructure, partners with information security stakeholders on system hardening and accreditation activities, maintains operational documentation and evidence, and responds on site to incidents, outages, and recovery needs. The position helps establish a dependable local support model and advance the Waco secure-area environment toward an accredited sustainment model.

Requirements

• Bachelor’s degree in Computer Science, Information Technology, or a related field and a minimum of 9 years of prior relevant experience; or a graduate degree in one of those fields and a minimum of 7 years of prior related experience; or, in lieu of a degree, a minimum of 13 years of prior related experience in systems administration.
• Hands-on experience with Linux administration on Red Hat-based distributions, Windows administration, Active Directory, shell scripting, network and storage services, system hardening, and support for secure environments.

Nice To Haves

• Experience with configuration management and automation tools such as Ansible, AWX, Puppet, or Chef.
• Experience with centralized authentication technologies such as Active Directory, FreeIPA, LDAP, Kerberos, or IDM.
• Experience administering source-code platforms such as GitLab, GitHub, or SVN.
• Security+ or equivalent security certification is strongly desired.
• Experience with STIG implementation, audit readiness, Windows domain operations, and cross-functional support in defense or regulated environments is highly valuable.
• Familiarity with CI/CD pipelines, DevOps platforms, log analysis, metrics and monitoring, virtualization, multi-operating-system environments, cloud platforms, and security-focused troubleshooting in distributed systems.

Responsibilities

• Administer Red Hat-based Linux servers and workstations and Windows Server and workstations, including provisioning, troubleshooting, patching, privilege management, identity and access administration, configuration changes, and lifecycle support across secure lab and isolated network environments.
• Build and maintain infrastructure services including DNS, DHCP, NFS, automounts, SMB/Samba, Windows domain services, Active Directory, FreeIPA or LDAP, NTP, virtualization, storage, backup, and monitoring; document these services and ensure they are recoverable.
• Support software engineers with secure development infrastructure, including controlled remote access, standardized workstation and server images, source-code and DevOps platforms, and troubleshooting across multi-operating-system environments.
• Translate engineering needs into supportable services and establish clear ownership boundaries.
• Partner with information security stakeholders to harden and audit systems to security guidance.
• Implement or sustain STIG baselines, patching, vulnerability remediation, endpoint protection, centralized logging, security-tool integration, and evidence for CMMC, ATO, continuous monitoring, and program accreditation activities.
• Maintain operational evidence and status reporting, including asset and service inventories, ownership records, network and configuration diagrams, standard operating procedures, change records, audit artifacts, and reporting on open gaps, owners, aging, and next actions.
• Provide on-site operational response for incidents, outages, recovery activities, vendor coordination, emergency coverage, and closeout actions.
• Help stabilize a dependable local support model for the Waco secure-area environment and support its progress toward an accredited sustainment model.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior