Type of Requisition:

Pipeline

Clearance Level Must Currently Possess:

Top Secret SCI + Polygraph

Clearance Level Must Be Able to Obtain:

Top Secret SCI + Polygraph

Public Trust/Other Required:

None

Job Family:

IT Infrastructure and Operations

Job Qualifications:

Skills:

Email Management, Email Services, Exchange

Certifications:

None

Experience:

6 + years of related experience

US Citizenship Required:

Yes

Job Description:

ENDPOINT MANAGEMENT SYSTEMS ADMINISTRATOR

YOUR IMPACT

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.

MEANINGFUL WORK AND PERSONAL IMPACT

As anEmail ServicesSystems Administrator supporting CIS, you willoperate, secure, andoptimizeenterprise email and messaging services across complex multinetwork environments. You will maintainhigh availabilityemail platforms, ensure reliable communication services, and sustaincloud enabledcollaboration capabilities that directly supportmission criticaloperations. Your work enhances the resilience, performance, and readiness of enterprise messaging systems relied on by users worldwide.

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 basedaccess, 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 bothon premiseandcloud basedmessaging platforms, ensuring seamless integration and minimal user impact
• Execute backup, recovery, and failover operations for Exchange systems and related messaging components,validatingresilience and continuity of operations
• Troubleshoot complex issues involving authentication, DNS, PKI, mobile clients,cross domainrouting, 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, andmessaging relatedinfrastructure tomaintaincompliance and secure service baselines
• Identifyand remediate noncompliant messaging systems by reviewing vulnerability and SCAP reports, resolving patch exceptions, andvalidatingcorrective actions across messaging environments

WHAT YOU9LL NEED TO SUCCEED:

• EXPERIENCE REQUIREMENTS:
  Email ServicesSystems Administrator Senior - Requires a Bachelor9s degree in an ITrelated field or 8+ years of relevant IT experience in lieu of a degree.
  Email ServicesSystems Administrator Principal - Requires a Bachelor9s degree in an ITrelated field or 10+ years of relevant IT experience in lieu of a degree.
  Email ServicesSystems Administrator Sr. Principal - Requires a Bachelor9s degree in an ITrelated 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
• Strongproficiencywith email routing, SMTP, DNS, authentication, certificates, and mobile/ remoteemail 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, andcross teamcollaboration skills
• US citizenship required

• LOCATION: Onsite

Scheduled Weekly Hours:

40

Travel Required:

None

Telecommuting Options:

Onsite

Work Location:

USA MD Annapolis Junction

Additional Work Locations:

USA CO Colorado Springs - 8610 Explorer Dr (COC036), USA DC Washington, USA VA Springfield - 7770 Backlick Rd (VAS110)

Total Rewards at GDIT:

Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.

Our Identity Verification Process:

As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes.