Senior Linux Systems Administrator
Company: The One 23 Group
Location: Herndon
Posted on: February 18, 2026
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Job Description:
Job Description Job Description Description: THE COMPANY 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
Defense, 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 POSITION The expert will have strong knowledge of
Red Hat Enterprise Linux (RHEL) systems and will be able to design
and implement automation scripts. They should also understand
virtualization systems (like VMWare) and enterprise
backup/restoration strategies (preferably using NetApp). This role
involves providing high-level technical support and guidance for
RHEL Operating Environments, related systems, and middleware,
focusing on system administration for JSSC operations.
RESPONSIBILITIES: Oversee key system administration tasks with a
team of technicians, managing various versions of RHEL operating
systems, supporting tools, middleware, and user privileges.
Participate in change and configuration control processes and
implement Security Technical Implementation Guides (STIG) to
support Information Assurance Vulnerability Management (IAVM).
Provide leadership on major tasks and technology projects to
maintain systems and applications. Communicate with customers and
contract leaders about complex technical issues, ensuring
cybersecurity standards are met for JSSC and its customers. Analyze
application diagnostics and system performance, resolving
challenges with RHEL utilities and software upgrades to improve
reliability. Troubleshoot incidents related to RHEL systems and
document responses, developing strategies and standards for RHEL
resources. Create and oversee system upgrades, identifying needs
and planning effectively to meet customer requirements. Develop,
install, and monitor RHEL systems, migrating application subsystems
and working with customers and development teams on improvements.
Conduct performance monitoring and support cybersecurity efforts to
maintain system security. Evaluate and recommend software,
guidelines, and project plans to junior staff, providing solutions
for prompt issue resolution, patch management, and administrative
support. ADDITIONAL INFORMATION Position located on-site at the
Pentagon Video interviews will be conducted Requirements: Minimum
active Top-Secret Clearance with the ability to be Sensitive
Compartmented Information (SCI) indoctrinated; AND, DoD 8140/8570
Information Assurance Technical Level II (IAT-II) CompTIA Security
CE Certification; AND, High School Diploma; AND, 10 years of
information technology experience. PREFERRED PERL Scripting
Experience. Equal opportunity employer, including
disability/vets.
Keywords: The One 23 Group, Baltimore , Senior Linux Systems Administrator, IT / Software / Systems , Herndon, Maryland
