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

Description

Are you looking to take the next steps in your career as a Senior Systems Administrator? Let’s chat and see if we are a good match!

• Opportunity:
• Virtual Service Operations is searching for an experienced Level 3 Systems Administrator with strong hands-on expertise in Microsoft Azure Government (GCC High environments), Windows Server infrastructure, and enterprise systems administration to join our team in Reston, VA. This position is responsible for designing, building, configuring, securing, maintaining, and troubleshooting complex Microsoft infrastructure environments supporting commercial, government, and Defense Industrial Base (DIB) clients.

The ideal candidate is a highly technical, hands-on infrastructure engineer capable of independently deploying new environments, resolving escalated technical issues, and supporting secure, highly available production systems.

Key Responsibilities:

Azure Government & Cloud Infrastructure

• •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 (NSGs), 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 (RBAC), 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.

Windows Server Engineering & Administration

• •Build, configure, deploy, and maintain Windows Server 2019, 2022, 2025, and supported legacy environments.
• •Install and configure Active Directory Domain Services (AD DS), 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.

Hybrid Infrastructure & Identity

• •Support hybrid Active Directory and Microsoft Entra ID environments.
• •Configure and troubleshoot identity synchronization, authentication, and access management.
• •Administer Microsoft Entra Connect Sync / Cloud Sync where applicable.
• •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.

Level 3 Infrastructure Support & Troubleshooting

• •Serve as the highest technical escalation point for L1/L2 service desk and infrastructure support teams.
• •Independently troubleshoot complex server, cloud, virtualization, storage, networking, and identity issues.
• •Perform root cause analysis (RCA) for recurring or critical infrastructure 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.

Security, Compliance & Operational Resilience

• •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 supporting compliance audits.

Automation, Monitoring & Documentation

• •Develop and maintain PowerShell scripts for Windows and Azure administration.
• •Automate routine provisioning, patching, configuration, and maintenance tasks.
• •Utilize Azure Monitor, Log Analytics, Windows Event Viewer, and enterprise monitoring platforms.
• •Create and maintain technical documentation, architecture diagrams, standard operating procedures (SOPs), and system build documentation.
• •Identify opportunities to improve infrastructure reliability, efficiency, security, and operational performance.

Required Qualifications:

• •7+ years of hands-on experience administering Microsoft Windows Server and enterprise infrastructure.
• •3+ years of experience administering Microsoft Azure infrastructure, preferably Azure Government.
• •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.

Preferred Qualifications:

• •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 (IaC), 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 (MSP) environment.
• •Experience supporting multiple customer environments and managing competing technical priorities.

Preferred Certifications:

• •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 equivalent security certification

Requirements

• •This position is on-site in Reston, VA, with the possibility of remote work. Remote employees must travel to the Reston, VA office one week per month (Monday–Thursday).
• •Must be authorized to work in the United States.
• •Please note that pursuant to a government contract, this specific position requires U.S. citizenship status.
• •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.

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