Senior Systems Administrator (L3) – Azure Government & Windows Infrastructure

Virtual Service Operations • Reston, VA

2d • $115,000 - $135,000 • Hybrid

About The Position

Virtual Service Operations (VSO) is seeking an experienced Level 3 Systems Administrator to design, build, configure, secure, maintain, and troubleshoot complex Microsoft infrastructure environments for commercial, government, and Defense Industrial Base clients. The role focuses on Microsoft Azure Government, including GCC High environments, Windows Server infrastructure, and enterprise systems administration. The successful candidate will be hands-on and capable of independently deploying environments, resolving escalated technical issues, and supporting secure, highly available production systems.

The position is based on-site in Reston, Virginia, with the possibility of remote work. Remote employees must travel to the Reston office one week per month, Monday through Thursday. The role includes scheduled after-hours maintenance and participation in an on-call escalation rotation. Candidates must be authorized to work in the United States; U.S. citizenship is required for this specific government-contract position. Customer-specific citizenship, background screening, or clearance requirements may also apply.

VSO describes itself as a hybrid cloud and managed services consulting firm with partnerships including AWS, IBM, and Microsoft. The company offers ongoing learning and development opportunities, competitive salaries, health benefits, and flexible work arrangements. It describes its culture as virtue-centered and emphasizes teamwork, communication, problem-solving, regular performance appraisals, and career advancement.

Requirements

• At least 7 years of hands-on experience administering Microsoft Windows Server and enterprise infrastructure.
• At least 3 years of experience administering Microsoft Azure infrastructure; Azure Government experience is preferred.
• Demonstrated experience building Windows Server environments from initial deployment through production operations.
• Advanced expertise with Active Directory, Group Policy, DNS, DHCP, and Windows authentication.
• Strong experience with Azure virtual machines, networking, storage, backup, and access management.
• Experience supporting hybrid on-premises and Azure environments.
• Proficiency in PowerShell scripting and infrastructure automation.
• Experience with virtualization technologies such as VMware vSphere and Microsoft Hyper-V.
• Strong understanding of TCP/IP, routing, firewalls, VPNs, and network troubleshooting.
• Experience troubleshooting complex enterprise infrastructure incidents.
• Ability to independently execute infrastructure deployments and resolve advanced technical problems.
• Strong technical documentation and communication skills.
• Must be authorized to work in the United States.
• U.S. citizenship is required for this specific government-contract position.
• Ability to meet customer-specific citizenship, background screening, or clearance requirements where applicable.
• Willingness to participate in scheduled after-hours maintenance and an on-call escalation rotation.
• Ability to work independently while collaborating with infrastructure, cybersecurity, service desk, and engineering teams.

Nice To Haves

• Direct experience supporting Azure Government and Microsoft 365 GCC High environments.
• Experience supporting DIB contractors, federal customers, or regulated organizations.
• Familiarity with NIST SP 800-171, CMMC Level 2, and secure infrastructure operations.
• Experience with Azure Site Recovery, Azure Backup, and disaster recovery architectures.
• Experience with Infrastructure as Code, including Terraform, Bicep, or ARM templates.
• Experience with Microsoft Intune, Defender for Endpoint, and Microsoft Sentinel.
• Experience with Microsoft Azure Arc and hybrid server management.
• Prior experience working in a Managed Services Provider environment.
• Experience supporting multiple customer environments and managing competing technical priorities.
• Microsoft Certified: Azure Administrator Associate (AZ-104).
• Microsoft Certified: Azure Solutions Architect Expert (AZ-305).
• Microsoft Certified: Windows Server Hybrid Administrator Associate.
• CompTIA Security+ or an equivalent security certification.

Responsibilities

• Design, deploy, configure, and administer Microsoft Azure Government infrastructure, including environments supporting GCC High customers.
• Provision and manage Azure virtual machines, virtual networks, subnets, network security groups, storage accounts, and backup services.
• Configure and troubleshoot Azure VPN gateways, site-to-site connectivity, private endpoints, and hybrid cloud infrastructure.
• Administer Azure role-based access control, resource policies, and subscriptions.
• Implement and maintain Azure Backup, Azure Site Recovery, disaster recovery, and business continuity solutions.
• Monitor Azure infrastructure health, performance, availability, and resource utilization.
• Support Azure infrastructure migrations, modernization, and optimization projects.
• Build, configure, deploy, and maintain Windows Server environments, including Windows Server 2019, 2022, and 2025 and supported legacy systems.
• Install and configure Active Directory Domain Services, DNS, DHCP, Group Policy, and related Windows infrastructure services.
• Administer domain controllers, organizational units, trusts, replication, and authentication services.
• Deploy and maintain Windows Server virtual machines across Azure and on-premises virtualization platforms.
• Perform operating system upgrades, migrations, patching, hardening, and lifecycle management.
• Configure Windows file services, NTFS permissions, SMB shares, and storage management.
• Diagnose and resolve complex Windows Server, Active Directory, authentication, and infrastructure performance issues.
• Support hybrid Active Directory and Microsoft Entra ID environments, including identity synchronization, authentication, and access management.
• Administer Microsoft Entra Connect Sync or Cloud Sync where applicable, and support Microsoft 365 GCC High tenant infrastructure and identity integrations.
• Implement and maintain Conditional Access, multifactor authentication, and privileged access configurations.
• Troubleshoot hybrid connectivity, authentication, DNS, and directory synchronization issues.
• Serve as the highest technical escalation point for L1/L2 service desk and infrastructure support teams.
• Troubleshoot complex server, cloud, virtualization, storage, networking, and identity issues; perform root cause analysis for recurring or critical incidents.
• Resolve high-priority production outages and participate in incident recovery efforts.
• Develop technical solutions and permanent corrective actions for recurring problems.
• Support infrastructure change management, maintenance windows, and production deployments.
• Provide technical guidance and mentorship to junior systems administrators and support engineers.
• Implement Windows Server and Azure security baselines consistent with Microsoft best practices.
• Support infrastructure controls aligned with NIST SP 800-171, CMMC Level 2, and applicable customer security requirements.
• Apply system hardening standards, vulnerability remediation, and secure configuration management.
• Coordinate with SOC and cybersecurity teams to investigate and remediate infrastructure-related security findings.
• Support endpoint and server protection platforms, including Microsoft Defender for Endpoint.
• Maintain infrastructure configuration documentation and technical evidence for compliance audits.
• Develop and maintain PowerShell scripts for Windows and Azure administration, and automate routine provisioning, patching, configuration, and maintenance tasks.
• Use Azure Monitor, Log Analytics, Windows Event Viewer, and enterprise monitoring platforms.
• Create and maintain technical documentation, architecture diagrams, standard operating procedures, and system build documentation.
• Identify opportunities to improve infrastructure reliability, efficiency, security, and operational performance.

Benefits

• Ongoing learning and development opportunities.
• Competitive salaries.
• Health benefits.
• Flexible work arrangements.
• Benefits for eligible employees related to health, retirement, and professional development.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed