Senior Redhat Linux Systems Administrator

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Senior Redhat Linux Systems Administrator

Senior Redhat Linux Systems Administrator
Arlington, VA

** Active Top Secret Clearance Required**

At The One 23 Group, our mission is to set the benchmark for excellence in government services. We empower our clients in the Department of War, Intelligence Community, and Federal Civilian sectors to excel with our advanced capabilities. Our dedication lies in fostering a people-first culture, underpinned by steadfast ethical principles. Embracing innovative technologies and process improvements, we are steadfast in our journey toward a future that is both bright and transformative.

Our expertise spans Enterprise IT, Mission IT and Cyber. With our global footprint, we place a strong emphasis on nurturing our people and culture, which forms the core of our successful strategies in leadership and financial management. We pride ourselves on our extensive experience and effective approach, ensuring that we lead with both innovation and integrity.

The Senior Linux Systems Administrator provides Tier II/III administration and operational support for Red Hat Enterprise Linux (RHEL) and UNIX server environments supporting JSSC Enterprise Services. Based primarily at the Pentagon, this position supports GCCS-J and JPES mission environments across production, test, and development systems. Responsibilities include server administration, troubleshooting, patching, performance monitoring, security compliance, backup and recovery coordination, configuration management, and technical documentation.

The position requires an active Top Secret clearance
, eligibility for SIPRNet access, participation in a 24/7 on-call rotation, and the ability to support continuity-of-operations requirements at Site-R when designated.

• Active Top Secret security clearance with eligibility for SIPRNet access.
• At least 10 years of relevant IT experience providing technical support and solutions for complex systems and operational environments.
• Advanced experience administering UNIX/Linux servers, preferably Red Hat Enterprise Linux.
• Expertise in systems administration, systems architecture, systems integration, network systems management, or a related technical discipline.
• Current certification meeting DoD IAT Level II requirements, such as Security+, CySA+, GSEC, GICSP, SSCP, CCNA Security, or another approved certification.
• Ability to work independently, exercise sound technical judgment, and develop solutions to complex IT problems.
• Ability to support 12x5 operations and participate in a 24/7 on-call rotation.
• Ability to respond within two hours of notification when on call.
• Ability to relocate to Site-R within 12 hours for COOP exercises or real-world contingencies when designated as an Emergency Relocation Group member.
• Ability to perform planned maintenance, repairs, and upgrades outside normal business hours when required.

• Administer and maintain Red Hat Enterprise Linux and UNIX servers across production, test, and development environments.
• Perform account administration, operating system maintenance, resource monitoring, log analysis, performance tuning, storage support, and system troubleshooting.
• Engineer, configure, and sustain Linux server hardware, operating systems, and supporting software for mission-critical environments.
• Test and deploy operating system, COTS, GOTS, security, and IAVA-related patches through approved change-control processes.
• Apply DISA STIGs and support vulnerability identification, remediation, and security compliance activities.
• Support backup and recovery coordination, disaster recovery, and continuity-of-operations requirements.
• Monitor system health,…