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Senior Linux - Windows System Administrator

ICF International

$98,124 - $166,810
Oct 1, 2025
• Reston, VA, USA
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The Treasury program is seeking a Systems Administrator to support Linux and Windows environments, ensuring optimal system performance and adherence to security compliance standards.

Requirements

  • 7+ years of extensive hands-on experience and deep expertise with Linux internals, system architecture, performance tuning, and security.
  • 2+ years of experience with Windows Administration, including scripting.
  • 1+ years of experience with DNS Administration
  • 1+ years of experience in core networking technologies.
  • 1+ years of experience performing or supporting Windows and Linux vulnerability scans and executing remediation activities.
  • 1+ years of exposure or training of SIEM tools (e.g., Splunk).
  • 1+ years of exposure or training in Cloud Technical Architecture and cloud system administration.

Responsibilities

  • Administer and support both Linux and Windows operating systems, ensuring optimal system performance and adherence to security compliance standards.
  • Apply patches, monitor vulnerabilities, and coordinate with the Oracle cloud provider and the Treasury team to remediate findings.
  • Participate in and respond to security data calls; document security controls and system changes as required.
  • Engage in transparent and customer-centric collaboration with Treasury teams, ensuring proactive communication regarding progress updates and key technical decisions.
  • Support DNS configurations and networking infrastructure.
  • Leverage SIEM tools such as Splunk to monitor system logs and security events.
  • Ensure all tasks are completed in alignment with FISMA, NIST, and other federal security frameworks.

Other

  • Must be able to obtain and maintain a Public Trust clearance.
  • US Citizenship is required (required by the federal government for this position).
  • MUST RESIDE IN THE United States (U.S.) and the work MUST BE PERFORMED in the United States (U.S.), as this work is for a federal contract and laws do apply.
  • Strong written and verbal communication skills
  • 6 months of experience working transparently (on camera, if remote) and effectively with government stakeholders.