Senior Linux System Administrator

• Be part of a collaborative, inclusive, and innovative work culture
• Enjoy tremendous growth potential in a highly performing technical environment

Primary Responsibilities

• 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.

Required Qualifications

• Bachelor’s degree with 6–8 years of relevant experience, or master’s degree with 4–6 years of experience in IT operations supporting Linux servers and virtualization environments.
• Active Top Secret/SCI clearance.
• Hands-on experience administering Red Hat Enterprise Linux (RHEL) systems.
• Direct experience supporting systems using Red Hat Satellite.
• Understanding of virtualized infrastructure, server backup and restoration procedures, and cyber hardening techniques.
• Experience applying DoD STIGs and security compliance controls.
• Basic experience with log file analysis and system monitoring.
• Strong troubleshooting and problem-solving skills in complex operational environments.

Desired Qualifications

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

Certifications

• DoD 8570 IAT Level II or III certification (e.g., Security+ CE, CASP+, CISSP).
• Red Hat Certified System Administrator (RHCSA) – Preferred.

What's In it For You

• Customer Experience: Strive for excellence and delight our clients
• Innovation: Embrace creative thinking to enable continual growth and powerful solutions
• Accountability: Take ownership of and pride in our actions and service delivery
• Inspire: Be inspired to be your best self and have fun in the process
• Integrity: Do the right thing, the right way, every time!
• Stewardship: The careful and responsible management of something entrusted to our care.

• Be part of a collaborative, inclusive, and innovative work culture. 
• Enjoy tremendous growth potential in a high-performing team environment. 

• Health, dental, and vision insurance 
• Life insurance 
• Short-and-long term disability 
• Paid time off (PTO) 
• 401k retirement plan with employer match
• Annual Professional Development Reimbursement Program 
• And more!