Senior Systems Administrator, Microsoft Exchange

Arlington County Government

Senior Systems Administrator managing Microsoft Exchange and Office 365 services for Arlington County. Ensuring system availability, security, and performance in a hybrid cloud environment.

Posted 5/8/2026full-timeArlington • Virginia • 🇺🇸 United StatesSenior💰 $103,084 - $159,764 per yearWebsite

Tech Stack

Tools & technologies

AzureCloudVMware

About the role

Key responsibilities & impact

Provide high-level administration of the County’s enterprise infrastructure, including server environments, Active Directory, and Microsoft Office 365 services.
Serve as the senior technical resource for the County’s email and messaging environment, supporting a Microsoft Exchange and Azure-based platform.
Ensure system availability, security, and performance as the lead administrator for this service area.
Manage user mailboxes, distribution lists, and access permissions while ensuring adherence to County policies and regulatory requirements.
Configure and support email security measures and threat-protection tools, including spam filtering, encryption, and authentication standards.
Diagnose and resolve mail flow issues, synchronization problems, and system performance concerns.
Support hybrid cloud operations, including Azure Active Directory synchronization and identity management.
Develop and maintain technical documentation, operational procedures, and system standards.
Automate administrative tasks using scripting and reporting tools, and collaborate with network, security, and application teams.

Requirements

What you’ll need

Bachelor’s degree in Computer Science, Information Systems Management, or a related field;
Considerable experience directly related to managing and implementing information systems, operating systems, Storage Area Networks (SAN), systems analysis, and networking.
Microsoft Certified: Administrator Expert (MS-102) is preferred.
Hands-on experience with Exchange and Office 365 administration, along with strong skills in Active Directory, Windows Server, PowerShell automation, and messaging/security management;
Email security tools, threat protection, and compliance features;
Virtualization platforms (VMware, Hyper‑V) supporting Exchange environments;
Implementing retention policies, litigation hold, eDiscovery, and compliance center features.

Benefits

Comp & perks

Remote work (telework) available with prior supervisor approval

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Microsoft ExchangeAzureActive DirectoryOffice 365PowerShellWindows ServerEmail securityThreat protectionVirtualizationStorage Area Networks (SAN)

Certifications

Microsoft Certified: Administrator Expert (MS-102)