Senior Systems Administrator - Windows

ValidaTek • Pensacola, FL

57d

About The Position

Validatek is seeking a Senior Systems Administrator to join our mission-focused IT Operations team supporting Department of Defense (DoD) customers. This role is responsible for the administration, security, and reliability of enterprise Windows-based systems , ensuring compliance with DoD cybersecurity and operational standards. The ideal candidate is a hands-on technical expert with deep experience in Active Directory, DNS, DHCP, Group Policy, MS SQL , and SMB file shares , capable of managing large, complex environments with precision and accountability.

Requirements

• U.S. Citizenship (required).
• Active Secret Clearance with ability to obtain Top Secret .
• 8+ years of hands-on experience as a Systems Administrator in a DoD or enterprise IT environment.
• Deep technical expertise in: Windows Server Administration Active Directory, DNS, DHCP, Group Policy SMB File Shares and NTFS permissions MS SQL Server management and maintenance Open Systems Interconnection (OSI) Model and network layer troubleshooting
• Proven experience implementing DoD STIGs and supporting RMF compliance.
• Solid understanding of network fundamentals , including IP addressing, VLANs, and routing.
• Strong communication and problem-solving skills in mission-critical environments.

Nice To Haves

• Experience with Linux Administration (RHEL, CentOS, or Ubuntu).
• Experience using Ivanti Security Controls for agent and agentless patch management
• Familiarity with ITIL v4 and Knowledge-Centered Services (KCS) frameworks.
• Automation experience using Ansible , PowerShell , Python , and Bash .
• Experience with VMware vSphere , Hyper-V , or other virtualization platforms.
• Prior work supporting classified or air-gapped environments.

Responsibilities

• Manage, maintain , and secure Windows Server environments across multiple domains and enclaves.
• Administer and troubleshoot Active Directory (AD) , DNS , DHCP , Group Policy , and SMB file shares .
• Support and maintain Microsoft SQL Server databases, including patching, backups, and performance optimization.
• Apply and validate DoD STIGs to maintain compliant system configurations.
• Contribute to RMF (Risk Management Framework) documentation and accreditation activities.
• Maintain accurate system documentation , standard operating procedures (SOPs), and change records.
• Collaborate with cross-functional teams to resolve complex infrastructure issues and enhance service reliability.
• Automate operational workflows using PowerShell , Ansible , Python , and Bash .
• Participate in system monitoring, patching, and configuration management cycles.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed
• Number of Employees: 101-250 employees