Linux Systems Administrator

CACI•Fort Meade, MD

8d•$120,800 - $265,800•Onsite

About The Position

We are seeking a highly skilled Linux Systems Administrator to support mission-critical enterprise infrastructure in a secure Department of Defense/Intelligence Community environment. The successful candidate will provide advanced systems administration, network infrastructure support, virtualization, automation, cybersecurity compliance, and enterprise systems maintenance while ensuring high availability, security, and operational readiness. This position requires an experienced systems engineer capable of working independently, troubleshooting complex infrastructure issues, implementing secure enterprise solutions, and supporting highly classified operational environments.

Requirements

Active TS/SCI clearance with a current Polygraph
Bachelor's degree in Information Technology, Computer Science, Engineering, or related field (additional relevant experience may be substituted for education)
10+ years of progressive Systems Administration experience supporting enterprise IT infrastructure in secure Linux environments
DoD 8570/8140 IAT Level II certification (Security+, CySA+, CCNA Security, or equivalent)

Nice To Haves

Containerization technologies including Docker and Kubernetes
Infrastructure as Code (IaC) and configuration management best practices
Enterprise monitoring and logging solutions (Splunk, Elastic, SolarWinds, etc.)
Active Directory, DNS, DHCP, PKI, LDAP, and certificate management
Disaster recovery, backup technologies, and high-availability architectures
Cisco (CCNA/CCNP), Palo Alto (PCNSA/PCNSE), VMware (VCP), Red Hat (RHCSA), or equivalent technical certifications

Responsibilities

Advanced systems administration
Network infrastructure support
Virtualization
Automation
Cybersecurity compliance
Enterprise systems maintenance
Ensuring high availability, security, and operational readiness
Troubleshooting complex infrastructure issues
Implementing secure enterprise solutions
Supporting highly classified operational environments
Administration and support of Cisco ASA, Cisco Firepower, and Palo Alto firewalls, including security policy management, troubleshooting, and enterprise firewall administration.
Configuration, implementation, and maintenance of IPSEC VPNs, secure VPN tunneling (including ASA-to-ASA connectivity), and secure enterprise networking.
Administration of VMware or comparable virtualization platforms, including virtual machine provisioning, maintenance, performance tuning, and lifecycle management.
Developing automation solutions using Python and/or Bash, with hands-on implementation of Ansible and Ansible Playbooks for infrastructure provisioning, configuration management, and operational efficiency.
Enterprise server administration across Windows and Linux platforms, system hardening, patch management, and infrastructure support.
Performing IAVA patching, vulnerability remediation, STIG implementation, and maintaining compliance with DoD cybersecurity requirements.
Working knowledge of Secure The Enterprise (STE) and Secure The Network (STN) processes and security initiatives.
Utilizing Nessus for vulnerability scanning, analysis, remediation, and continuous security monitoring.
Hardware installation, rack and stack, structured cabling, equipment deployment, and maintaining accurate infrastructure documentation and network diagrams.
Troubleshooting complex systems, networks, and security issues while supporting highly available enterprise environments.