Senior Systems Administrator - Windows
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. Shift: Monday - Friday: 7:00am - 3:30pm CST
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.
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What This Job Offers
Job Type
Full-time
Career Level
Mid Level
Industry
Professional, Scientific, and Technical Services
Education Level
No Education Listed
Number of Employees
101-250 employees
