Senior Linux Systems Administrator

Responsibilities

• Full lifecycle management of Linux servers, including installation, configuration and patching in production and test environments.
• Provision servers and environments and manage user access.
• Automation knowledge scripting in Unix shell and Ansible playbooks.
• Perform security patching, upgrades, and hardening to meet compliance standards and remediate critical vulnerabilities.
• Maintain NTP services in the production environment.
• Maintain satellite servers for the agency, software releases and patches.
• Experience with the following emerging technologies or equivalent technology: Kubernetes, OpenShift, Containers, GitHub, Ansible Tower.
• Ensure compliance with security standards and practices aligned with DoD STIGs.
• Experience with web servers and use of certificates- Open Source: Apache Hadoop, Zookeeper, Puppet
• App Servers: JBoss, Tomcat, Jetty, NGINX, HT

Qualifications

• Active Top Secret/SCI Clearance.
• BS with 6-8 years or MS degree with 4-6 years of experience in IT operations working with Linux servers and Virtualization.
• DoD 8570 IAT Level II or III certification (e.g., Security+ CE, CASP+, CISSP).
• Hands-on experience administering Red Hat Enterprise Linux environments.
• Direct experience supporting systems with Red Hat Satellite.
• Understanding of virtualized infrastructure, server backup and restoral procedures, application of STIGs and cyber hardening approaches.
• Basic experience with log file analysis.
• Strong troubleshooting and problem-solving skills.

PREFERRED QUALIFICATIONS

• Red Hat certifications (RHCSA or RHCE).
• Experience implementing and maintaining DISA STIG compliance using Red Hat Satellite and Ansible.
• Experience integrating Linux systems with Active Directory or LDAP.
• Familiarity with virtualization platforms (VMware, KVM).
• Scripting experience (Bash or Python) to support automation initiatives
• Experience supporting classified networks or cross-domain environments