Sys Admin Windows/UNIX (RHEL)

The Squires GroupArlington, VA
$75Hybrid

About The Position

We are seeking an experienced Windows / UNIX System Administrator to support a large-scale ERP modernization initiative within a highly regulated federal environment. This role is responsible for the administration, maintenance, and optimization of enterprise server infrastructure across Windows Server and Linux/UNIX platforms, with a strong focus on Red Hat Enterprise Linux (RHEL). This position plays a key role in ensuring system stability, security, and performance, supporting mission-critical applications hosted across on-premises and cloud environments. This is a 75% remote position with approximately 25% quarterly travel to the Washington, DC metro area. Per our Federal Government Contract, candidates must be U.S. Citizens with an Active Secret Clearance.

Requirements

  • U.S. Citizenship required with an Active Secret Clearance or higher
  • 5+ years of experience in system administration across Windows Server and Linux/UNIX environments, with strong expertise in RHEL
  • Demonstrated ability to manage and support complex enterprise server environments
  • Strong knowledge of system administration best practices, including patching, security, monitoring, and disaster recovery
  • Proficiency in scripting and automation using PowerShell and Bash/Shell
  • Experience with virtualization technologies (e.g., VMware, Hyper-V) and familiarity with cloud platforms (e.g., AWS, Azure)
  • Understanding of containerization technologies such as Docker and/or Kubernetes is a plus
  • Strong troubleshooting, analytical, and problem-solving skills
  • Excellent communication and collaboration skills
  • Experience in a federal or highly regulated environment preferred
  • Familiarity with security principles, including least-privilege access, is a plus
  • Bachelor’s degree or equivalent experience preferred

Nice To Haves

  • Understanding of containerization technologies such as Docker and/or Kubernetes is a plus
  • Experience in a federal or highly regulated environment preferred
  • Familiarity with security principles, including least-privilege access, is a plus
  • Bachelor’s degree or equivalent experience preferred

Responsibilities

  • Install, configure, maintain, and support Windows Server and RHEL/Linux operating systems across physical, virtual, and cloud environments
  • Troubleshoot complex system issues, performance bottlenecks, and outages, providing timely resolution and escalation when needed
  • Manage system patching, security hardening, and vulnerability remediation to ensure compliance with security standards
  • Collaborate with network, database, and application teams to support integrated system operations
  • Develop and maintain automation scripts (e.g., PowerShell, Bash) to improve operational efficiency and reduce manual effort
  • Monitor system performance, capacity, and availability, proactively identifying and addressing potential issues
  • Support backup, restore, and disaster recovery processes, including validation and testing activities
  • Participate in change management processes, including maintenance planning and communication of system impacts
  • Maintain technical documentation, including system configurations and operational procedures
  • Provide guidance and support to junior administrators and serve as a technical escalation point
  • Stay current with evolving technologies, including virtualization and cloud platforms, to support continuous improvement initiatives

Benefits

  • paid time off (PTO)
  • medical, dental, and vision coverage
  • life insurance
  • long-term disability insurance
  • a 401(k) plan
  • additional optional benefits
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