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Email Services Systems Administrator - TS/SCI with Polygraph
- Annapolis, Maryland, United States
- Annapolis, Maryland, United States
About
Own your opportunity to support national defense. Your work will help keep critical operations secure and connected across the global enterprise—directly contributing to a mission that protects our nation every day.
CIO Infrastructure Services (CIS) is growing, and we invite both experienced incumbents and new team members to be part of what’s next. Together, we’ll strengthen continuity and drive the next generation of innovation.
WHAT YOU’LL NEED TO SUCCEED
EXPERIENCE REQUIREMENTS: Email Services Systems Administrator Senior – Requires a Bachelor’s degree in an IT-related field or 8+ years of relevant IT experience in lieu of a degree.
Email Services Systems Administrator Principal – Requires a Bachelor’s degree in an IT-related field or 10+ years of relevant IT experience in lieu of a degree.
Email Services Systems Administrator Sr. Principal – Requires a Bachelor’s degree in an IT-related field or 12+ years of relevant IT experience in lieu of a degree.
CLEARANCE: Active TS/SCI clearance with a favorable Polygraph
CERTIFICATIONS: Meet DoD 8140 Information Assurance Workforce certification requirements (e.g., Security+ CE)
Hands-on experience administering Exchange (on-premises) and M365 messaging services in enterprise or multi-network environments
Strong proficiency with email routing, SMTP, DNS, authentication, certificates, and mobile/remote email access
Experience with secure configuration, retention/archival policies, and compliance requirements for enterprise messaging
Familiarity with patching, vulnerability remediation, and configuration compliance for messaging platforms
Ability to diagnose and resolve complex messaging, access, routing, and authentication issues across hybrid environments
Strong documentation, communication, and cross-team collaboration skills
US citizenship required
LOCATION: Onsite
Key Responsibilities
Administer, maintain, and troubleshoot enterprise Exchange and M365 email systems, ensuring high availability, secure operations, and reliable mail flow across multiple networks
Support email architecture components including mailbox databases, transport services, journaling, archival/retention systems, SMTP relays, and message hygiene tools
Manage identity and access for messaging services, including authentication, PKI-based access, mobile access policies, and integration with directory services
Monitor system health, capacity, and performance; perform diagnostics; and implement corrective actions for service disruptions or degraded functionality
Support migrations, upgrades, and sustainment of both on-premise and cloud-based messaging platforms, ensuring seamless integration and minimal user impact
Execute backup, recovery, and failover operations for Exchange systems and related messaging components, validating resilience and continuity of operations
Troubleshoot complex issues involving authentication, DNS, PKI, mobile clients, cross-domain routing, and dependencies across hybrid environments
Maintain documentation, SOPs, service configurations, and operational artifacts supporting sustainment, change management, and continuous improvement
Apply security patches, cumulative updates, and platform hotfixes across Exchange, M365, and messaging-related infrastructure to maintain compliance and secure service baselines
Identify and remediate noncompliant messaging systems by reviewing vulnerability and SCAP reports, resolving patch exceptions, and validating corrective actions across messaging environments
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Languages
- English
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