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LeidosPosted 1 month ago

Linux and Windows Systems Administrator

$69,550–$125,725 year

On-siteBeavercreek, Ohio, United States

Full TimeBachelors DegreeEnterprise

Job Summary

Administer and maintain Windows, Linux, and virtualized systems across physical and air-gapped environments, performing Tier 2 incident resolution, root-cause analysis, and system hardening per DISA STIGs and NIST 800-53. Execute patching, vulnerability remediation, and configuration management while automating tasks with PowerShell, Bash, or Ansible. Deploy OS images via PXE and Kickstart, manage Active Directory and Layer 2 networking, and support after-hours on-call rotations. Work onsite in Beavercreek, OH, requiring an active DoD Secret clearance.

Required Qualifications

  • Current Active DoD Secret security clearance
  • Current CompTIA Security+ certification
  • Bachelor's degree in a technical field
  • 2–4 years of relevant experience
  • Experience administering Windows Server and Linux systems in secure or air-gapped environments
  • Experience implementing DISA STIGs, SCAP, NIST 800-53 security controls, and system hardening practices
  • Experience administering: Active Directory DNS DHCP File Servers
  • Experience building, integrating, maintaining, troubleshooting, and remediating Windows and Linux systems
  • Experience deploying operating systems using PXE, Kickstart, ISO/disk imaging, and automated installation methods
  • Experience configuring and troubleshooting Layer 2 switching, VLANs, TCP/IP, and network connectivity
  • Experience managing Windows and Linux updates, patching, and vulnerability remediation
  • Ability to develop automation scripts using PowerShell and Bash
  • Familiarity with Linux software repository management
  • Ability to work independently and collaboratively with minimal supervision
  • Strong analytical, communication, and problem-solving skills
  • Location: All work will be performed onsite in our Beavercreek, OH office
  • Participate in after-hours support and on-call rotations as required

Desired Qualifications

  • Red Hat Certified System Administrator (RHCSA) certification
  • Experience administering VMware, Hyper-V, or other virtualized environments
  • Experience with automation and configuration management tools, including Ansible
  • Experience supporting secure or classified DoD environments
  • Knowledge of backup, recovery, logging, and monitoring solutions
  • Experience performing DISA STIG remediation, SCAP compliance validation, and vulnerability scanning using Tenable Nessus

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