Senior IT Systems Administrator (Linux Admin)
Core
Design, build, secure, and operate Linux infrastructure for engineering and program teams in a defense environment, ensuring uptime and data protection.
Role type
Senior IC Linux Systems Administrator (Technical Lead)
Builds
Linux server environments (physical, virtual, cloud), hardened server images, automation pipelines, and disaster recovery systems.
Domain
Defense / Cybersecurity / Enterprise Infrastructure
Required skills
Linux administration (RHEL, Rocky, CentOS, Ubuntu, Debian), Bash scripting, Python, Ansible, systemd, networking, storage (LVM, NFS), SELinux, DISA STIG/CIS hardening, Active Directory/LDAP/Kerberos integration, backup and disaster recovery, change management, technical mentoring.
Preferred skills
Azure/AWS/Government cloud experience, container orchestration (Kubernetes), Terraform/CI-CD, RHCSA/RHCE/LFCS/CISSP certifications, CMMC/NIST 800-171 compliance experience, active U.S. government security clearance.
Technologies
Ansible, Python, Bash, systemd, LVM, NFS, Active Directory, LDAP, Kerberos, SSSD, SELinux, auditd, FIPS, Azure, AWS, KVM, VMware, Docker, Podman, Kubernetes, Terraform, Git.
Responsibilities
Architect and maintain Linux server environments across physical, virtual, and cloud platforms; design and maintain automation and configuration management; build hardened server images aligned to security baselines; manage Linux storage, networking, and performance tuning; integrate Linux systems with enterprise identity services; serve as technical lead and escalation point for complex incidents; mentor junior staff; lead infrastructure projects including migrations and site buildouts; own backup, disaster recovery, and business continuity design; monitor system health and remediate vulnerabilities; support compliance requirements (CMMC, NIST SP 800-171, FedRAMP).
Seniority
Senior, hands-on IC with technical lead responsibilities.
