Windows System Administrator

About the Role

Delaware Nation Industries is seeking a Senior Windows System Administrator to provide advanced systems administration and operations support for the Air Force Joint Worldwide Intelligence Communications System/Joint Interoperability Test and Services mission. This position will maintain secure, reliable, and highly available Windows infrastructure across classified and unclassified environments supporting mission-critical operations. The Senior Windows System Administrator will serve as a technical authority for Windows Server, Active Directory, Group Policy, enterprise software, virtualization, patching, configuration management, and system security.

Responsibilities

• Administer, configure, monitor, maintain, and troubleshoot Windows servers, workstations, applications, and related computing environments
• Perform Windows Server lifecycle administration, including system builds, provisioning, upgrades, patching, software deployment, configuration, backup, restoration, and decommissioning
• Manage Active Directory, Group Policy, DNS, DHCP, user accounts, permissions, groups, certificates, and other core enterprise services
• Support systems operating across classified and unclassified networks, including compartmented, segmented, and mission-essential environments
• Administer and troubleshoot VMware or comparable virtualized infrastructure, including virtual machines, templates, virtual networking, and storage dependencies
• Monitor system health, availability, capacity, performance, and security posture; analyze trends and recommend improvements
• Analyze complex hardware, software, operating system, application, virtualization, storage, and network issues; conduct root-cause analysis and implement durable solutions
• Apply DISA STIGs, IAVAs, security baselines, patch requirements, and other applicable DoD cybersecurity controls
• Support vulnerability scanning, remediation, compliance validation, and reporting using tools such as ACAS/Nessus, HBSS, and related security platforms
• Support Microsoft Endpoint Configuration Manager/SCCM or comparable configuration-management and software-deployment capabilities
• Maintain system backups, recovery procedures, configuration records, inventories, standard operating procedures, and technical documentation
• Support enterprise software, web services, identity services, storage, networking, cloud, containerized, and remote-access environments as assigned
• Coordinate with cybersecurity, Linux, network, storage, application, service desk, vendor, and Government personnel to resolve incidents and maintain continuity of operations
• Document incidents, changes, troubleshooting actions, and resolutions in the designated IT service-management or configuration-management system
• Participate in system integration, testing, exercises, planned maintenance, technical interchange meetings, and after-hours or on-call support as required
• Provide technical leadership, mentoring, cross-training, and knowledge transfer to other system administrators

Requirements

• Active DoD TS/SCI security clearance
• At least five (5) years of professional systems administration experience, including senior-level Windows administration in an enterprise, DoD, or classified environment
• DoD Cyber Workforce Framework and DoD 8140-compliant certification appropriate to the position; candidates must be able to satisfy JWAC certification and privileged-user requirements before receiving administrative rights
• Detailed knowledge of Windows Server administration, Active Directory, Group Policy, DNS, DHCP, account deployment, backup, and restoration
• Experience with Windows system security, hardening, vulnerability remediation, STIGs, IAVAs, and security compliance documentation
• Experience with virtualization technologies, preferably VMware vSphere and related management components
• Ability to diagnose complex technical problems, perform root-cause analysis, and communicate solutions clearly to technical and nontechnical stakeholders
• Strong written and verbal communication skills and the ability to work independently and lead technical efforts across a small, multidisciplinary team
• Experience supporting Air Force, JWAC, JITS, JCCE, SIPR, NIPR, JWICS, intelligence, or other DoD mission environments
• Experience with Microsoft Endpoint Configuration Manager/MECM or SCCM, HBSS, ACAS/Nessus, Jira, Cherwell, ServiceNow, or comparable ITSM tools
• Experience with VMware vSphere, vRealize, CloudBolt, Docker, Kubernetes, Azure, AWS, or other cloud and container technologies
• Experience with PowerShell, Python, Ansible, Git, or other automation and DevSecOps technologies
• Experience with enterprise storage, NAS/SAN, NFS, iSCSI, Exchange, IIS, database integration, load balancing, or remote-access services
• Familiarity with RMF, Authority to Operate packages, security control assessments, STIG Viewer, and DoD cybersecurity policy
• Bachelor's degree in information technology, computer science, cybersecurity, engineering, or a related field; equivalent experience may be considered
• Microsoft, VMware, Security+, or other relevant industry or DoD-aligned certification