Email Services Administrator – TS/SCI Cleared Messaging

General Dynamics - IT; Corridor North (MD); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Comprehensive benefits and wellness

401K with company match

Paid time off

Job summary

General Dynamics - IT is seeking an Endpoint Management Systems Administrator to secure, operate, and optimize enterprise email and messaging services across complex multinetwork environments. You will ensure high availability and seamless mail flow for Exchange and M365, both on premise and in the cloud, enabling reliable collaboration for mission critical operations. Active TS/SCI clearance with a favorable Polygraph is required.

Ethereum? No, TS/SCI.

Qualifications

• Experience administering Exchange and M365 in enterprise/multi-network environments.
• Experience with security patches, updates, and compliance for messaging platforms.
• Strong documentation and cross-team collaboration skills.
• Hands-on experience managing messaging architectures including archival/retention and journaling.

Responsibilities

• Administer, maintain, and troubleshoot Exchange and M365 across multiple networks for high availability.
• Support mailbox databases, transport services, journaling, archival/retention systems, SMTP relays, and mail hygiene tools.
• Manage identity and access, including PKI-based access and directory integration.
• Monitor system health, capacity, and performance; diagnose and remedy disruptions.
• Support migrations, upgrades, and sustainment of on-prem and cloud-based messaging platforms.
• Execute backup, recovery, and failover operations for Exchange and messaging components.
• Troubleshoot complex issues across hybrid environments (authentication, DNS, PKI, mobile access).
• Maintain documentation, SOPs, and configurations for sustainment and change management.

Skills

Email systems administration

Hybrid messaging environments

Identity and access management

Documentation

Education

Bachelor's degree in IT-related field

8+ years IT experience in lieu of degree

Tools

Exchange on-premises

Microsoft 365 (M365)

PKI authentication

DNS

Job description

General Dynamics - IT is seeking an Endpoint Management Systems Administrator to secure, operate, and optimize enterprise email and messaging services across complex multinetwork environments. You will ensure high availability and seamless mail flow for Exchange and M365, both on premise and in the cloud, enabling reliable collaboration for mission critical operations. Active TS/SCI clearance with a favorable Polygraph is required.

Ethereum? No, TS/SCI.