Senior Linux System Administrator

JCS Solutions is seeking a Senior Linux System Administrator to support the DTRA I3TS Infrastructure Services team in maintaining and optimizing the Linux production environment. The selected candidate will work within a virtualized infrastructure, applying ITIL best practices while collaborating closely with system administration teams and stakeholders.

Requirements

• Provision Linux servers and environments
• Manage user access and permissions
• Perform full lifecycle management of Linux servers, including installation, configuration, patching, and upgrades in production and test environments
• Develop and maintain automation using Unix shell scripting and Ansible playbooks
• Perform security patching, upgrades, and hardening to remediate vulnerabilities and maintain compliance with DoD STIGs
• Monitor system performance and respond to alerts and operational issues
• Establish and maintain NTP services within the production environment
• Maintain Red Hat Satellite servers, software releases, and patch repositories
• Support emerging technologies including Kubernetes, OpenShift, containers, GitHub, and Ansible Tower
• Administer web servers and manage SSL/TLS certificates
• Support open-source technologies such as Apache Hadoop, Zookeeper, and Puppet
• Administer application servers including JBoss, Tomcat, Jetty, NGINX, and HTTPD
• Lead and support multiple projects within the assigned area of responsibility
• Collaborate with internal teams and customer stakeholders across multiple functional areas
• Create, maintain, and implement system documentation and Standard Operating Procedures (SOPs)
• Provide support during business hours (M–F) and participate in on-call, extended-hours, or weekend support as required by mission needs

Benefits

• 401k Matching
• Retirement Plan
• Visa Sponsorship