Senior Systems Administrator

Primary Responsibilities

• Administer, maintain, and support enterprise applications within the customer environment.
• Perform installation, configuration, patching, upgrades, and lifecycle management of Windows and Linux servers.
• Maintain user accounts, permissions, and Active Directory integrations.
• Support deployment activities across development, test, staging, and production environments.
• Coordinate scheduled maintenance windows and execute system upgrades with minimal operational impact.
• Develop and maintain automation scripts using PowerShell, Bash, or Python to improve operational efficiency.
• Perform backup, recovery, and disaster recovery operations.
• Support accreditation activities and ensure compliance with customer, DoD, RMF, DISA STIG, and security requirements.
• Collaborate with security teams to remediate vulnerabilities and maintain compliance.
• Support incident response, root cause analysis, and corrective action implementation.
• Document system configurations, standard operating procedures, and technical documentation.
• Interface directly with customers to address operational tasking and mission requirements.

Required Qualifications

• Bachelor's degree in Information Technology, Computer Science, Engineering, or related field and 8–12 years of prior relevant experience, or Master's degree with 6–10 years of prior relevant experience.
• 8+ years of enterprise systems administration experience.
• Experience supporting mission-critical DoD or Intelligence Community environments.
• Strong administration experience with: Microsoft Windows Server, Red Hat Enterprise Linux (RHEL), VMware vSphere, Active Directory, DNS/DHCP, Group Policy.
• Experience with scripting and automation using PowerShell, Bash, or Python.
• Experience implementing and maintaining STIG compliance.
• Knowledge of RMF security controls and vulnerability remediation.
• Strong troubleshooting and analytical skills.
• Security+ CE or higher DoD 8570/8140 certification.
• Active Top Secret/SCI clearance with the ability to successfully pass a Polygraph examination.