Sr. MS Exchange Systems Engineer
Washington, DC
Experience: 7
Education: BS
Category: Information Technology
Contractor Work Model: Onsite
Brand: System One
Job ID: 347283
Date Posted: 03/05/2026
Shortcut: http://jobs.systemone.com/QXZbgI
Sr MS Exchange Systems Engineer
100% ONSITE in Washington DC
Per Federal contract U.S. Citizenship or green card Required
Must be able to pass enhanced background screen (criminal, financial, drug) for Public Trust clearance
Performance Period: 04/26 – 12/31/2026 with the possibility of extension.
W-2 or C2C
Must apply by March 19th
Position Requirements:
Exchange On-Premises Administration (20%) • Manage and maintain Microsoft Exchange Server 2016/2019/SE infrastructure including mailbox databases, DAGs, and high availability • Perform server maintenance, patching, certificate management, and capacity planning • Troubleshoot mail flow issues, connectivity problems, and performance bottlenecks • Configure transport rules, connectors, and Client Access Services • Manage integration with Enterprise Vault for legacy archive access
Exchange Online Administration (20%) • Administer Microsoft 365 Exchange Online environment and hybrid configuration • Manage mailbox migrations from on-premises to Exchange Online • Configure Exchange Online Protection (EOP), DLP policies, and mail flow rules • Implement retention policies, eDiscovery, and compliance features • Monitor service health and manage M365 compliance requirements • Oversee migration from Enterprise Vault to M365 native archiving/retention
Microsoft Teams Administration (25%) • Administer Teams environment including team/channel governance and lifecycle policies • Configure Teams voice features including Direct Routing, calling policies, and phone system • Manage Teams apps, bots, custom integrations, and connector policies • Implement Teams compliance including retention, eDiscovery, communication compliance, and information barriers • Configure guest access, external access, meeting policies, and live events • Troubleshoot Teams connectivity, quality issues, and client problems • Manage Teams device administration (phones, room systems, displays)
Email Security & Proofpoint Administration (15%) • Administer Proofpoint Email Security platform and configure filtering policies • Manage threat protection including TAP, URL Defense, and Attachment Defense • Monitor and respond to security incidents and phishing campaigns • Implement and maintain email authentication (DMARC, SPF, DKIM) and encryption • Generate compliance and security reports
M365 Ecosystem & Power Platform Support (10%) • Support Power Automate flows integrating with Exchange, Teams, and SharePoint • Assist with Power Platform governance, DLP policies, and connector security • Maintain integration points between SharePoint Online, OneDrive, and Teams • Support automation solutions leveraging M365 services • Understand licensing implications across M365 workloads
Automation & Scripting (10%) • Develop and maintain PowerShell scripts for Exchange, Teams, and M365 automation • Utilize Microsoft Graph API for advanced automation and reporting • Create bulk operation scripts for user provisioning, migrations, and configuration changes • Automate routine administrative tasks and reporting • Document and maintain script libraries and automation workflows
Additional Duties
• Participate in on-call rotation to provide Tier 2 support for M365 Platform • Provide Tier 3 support for escalated email and Teams issues • Document configurations, maintain procedures, and train staff • Collaborate with IT security and compliance teams on email and collaboration security initiatives • Assist with M365 governance and adoption planning
Required Technology & Experience
Experience Requirements
• 3-5 years email and collaboration platform administration experience
• Microsoft Exchange Server (2016 or later) administration experience
• Exchange Online and Microsoft 365 administration experience
• Microsoft Teams administration experience
• Proven experience with hybrid Exchange environments and cloud migrations
• PowerShell scripting experience for automation and bulk operations
• Email security platform administration (Proofpoint preferred)
Preferred Qualifications
• Microsoft 365 Certified: Messaging Administrator Associate (MS-203)
• Microsoft 365 Certified: Teams Administrator Associate (MS-700)
• Microsoft Certified: Security, Compliance, and Identity Fundamentals (SC-900)
• Proofpoint Certified Administrator
• Experience with Enterprise Vault administration and EV-to-M365 migrations
• Experience with Power Platform (Power Automate, Power Apps)
• Knowledge of regulatory compliance frameworks (GDPR, HIPAA, SOX, etc.)
• Experience with Microsoft Teams voice/calling and Direct Routing
• GitHub/version control for script management
Desired Soft Skills
• Strong analytical and troubleshooting abilities
• Excellent documentation and communication skills
• Ability to work independently and manage multiple priorities
• Customer service orientation for end-user support
• Proactive approach to system monitoring and maintenance
Ref: #851-Rockville-S1
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