Demo

Senior Systems Administrator

The One 23 Group
Herndon, VA Full Time
POSTED ON 10/8/2026
AVAILABLE BEFORE 11/2/2026
Description:

 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 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 contract specific operations.

Requirements:
  • 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 the contract 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

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

Salary.com Estimation for Senior Systems Administrator in Herndon, VA
$115,129 to $143,184
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