Sr. Exchange Online (EXO) Administrator (Systems Engineer)

System One
📍 Washington, DC, United States 💼 Full-time 🕒 Posted June 20, 2026

Job Description

Senior Exchange Online (EXO) Administrator
Washington, DC –100% onsite
Per Federal contract U.S. citizenship is required
Must be able to obtain Public Trust clearance
Start Date- 08/2026 through 12/2027 with possibility of long-term contract extension based on performance
Open to W2 and C2C
Must apply by June 30th

Position Summary
Manage and maintain our hybrid Exchange environment, including on-premises Exchange Server and Exchange Online (Microsoft 365). Ensure reliable email services, security, and compliance across the organization.

Key Responsibilities
• Administer and support hybrid Exchange infrastructure (on-premises and Exchange Online)
• Manage mailbox migrations, mail flow, and hybrid connectivity between environments
• Configure and maintain transport rules, DLP policies, retention policies, and email security features
• Monitor system performance, troubleshoot issues, and resolve user email problems
• Implem...

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Job Details

  • Location Washington, DC
  • Job Type Full-time
  • Category other-general
  • Posted Date June 20, 2026
  • Application Deadline June 25, 2026