Linux System Administrator

Zachary Piper Solutions is seeking a Linux System Administrator to support a company focused on mission‑critical government operations with a strong emphasis on cybersecurity, compliance, and network reliability. This position is on‑site in San Antonio, TX . The Linux System Administrator will own the full lifecycle management of Linux systems while supporting auditing, monitoring, and troubleshooting in a high‑security environment. This is a mission‑driven opportunity to play a key role in maintaining systems aligned with enterprise‑level visibility. Responsibilities Manage and maintain RHEL‑based Linux systems, ensuring performance, security, and compliance with NSA auditing and logging requirements Administer and support OpenNMS Meridian for monitoring, including setup of distributed monitoring, thresholds, and alarms Perform advanced troubleshooting across Linux, network, and Windows environments in collaboration with Tier 1–3 teams Implement and manage logging, auditing, and automation using tools such as Splunk Support system lifecycle management including patching, configuration, documentation, and ATO accreditation processes Required Qualifications 3+ years of experience in Linux system administration within secure or enterprise environments Strong experience with RHEL, systemd, package management, kernel tuning, firewall tools (firewalld/iptables), and OpenNMS Proficiency in CLI‑based troubleshooting, networking fundamentals, Active Directory, DNS/DHCP, and basic scripting (Bash/Python) Bachelor’s degree in IT, Computer Science, or a related field (or equivalent experience) Active Secret clearance and CompTIA Security+ certification required Compensation Salary Range: depending on experience Full Benefits Package: PTO, Paid Holidays, Medical, Dental, Vision, 401K, Tuition Reimbursement, Sick leave as required by law Keywords Linux System Administrator, RHEL, Red Hat, RHCSA, RHCE, OpenNMS, Meridian, Splunk, Cybersecurity, NSA Compliance, Auditing, Logging, Bash, Python, Network Troubleshooting, Active Directory, DNS, DHCP, ATO, Secret Clearance, San Antonio TX #J-18808-Ljbffr