Email Services Systems Administrator - TS/SCI with Polygraph
Type of Requisition:
PipelineClearance Level Must Currently Possess:
Top Secret SCI + PolygraphClearance Level Must Be Able to Obtain:
Top Secret SCI + PolygraphPublic Trust/Other Required:
NoneJob Family:
IT Infrastructure and OperationsJob Qualifications:
Skills:
Email Management, Email Services, ExchangeCertifications:
NoneExperience:
6 + years of related experienceUS Citizenship Required:
YesJob 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.
CIO Infrastructure Services (CIS) is growing, and we invite both our experienced incumbents and new team members to be part of what’s next. Incumbents bring invaluable mission insight, while new talent adds fresh ideas and energy. Together, we’ll strengthen continuity and drive the next generation of innovation.
MEANINGFUL WORK AND PERSONAL IMPACT
As an Email Services Systems Administrator supporting CIS, you will operate, secure, and optimize enterprise email and messaging services across complex multinetwork environments. You will maintain high availability email platforms, ensure reliable communication services, and sustain cloud enabled collaboration capabilities that directly support mission critical operations. 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 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
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
GDIT IS YOUR PLACE
At GDIT, the mission is our purpose, and our people are at the center of everything we do.
Growth: AI-powered career tool that identifies career steps and learning opportunities
Support: An internal mobility team focused on helping you achieve your career goals
Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off
Community: Award-winning culture of innovation and a military-friendly workplace
OWN YOUR OPPORTUNITY
Explore an enterprise IT career at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your desire to drive operations forward.
#CIS
The likely salary range for this position is $96,569 - $130,651. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.Scheduled Weekly Hours:
40Travel Required:
NoneTelecommuting Options:
OnsiteWork Location:
USA MD Annapolis JunctionAdditional Work Locations:
USA CO Colorado Springs - 8610 Explorer Dr (COC036), USA DC Washington, USA FL MacDill AFB - 7115 S Boundary Blvd (FLC096), 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.About Our Work:
We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology.Join our Talent Community to stay up to date on our career opportunities and events atgdit.com/tc.
Equal Opportunity Employer / Individuals with Disabilities / Protected VeteransSkills Required
- Active Top Secret SCI clearance with favorable Polygraph
- US citizenship
- Meet DoD 8140 Information Assurance Workforce certification requirements (e.g., Security+ CE)
- 6+ years related IT experience (varies by level; up to 12+ for Sr Principal)
- Hands-on experience administering Exchange (on-premises) and Microsoft 365/M365 messaging services
- Proficiency with SMTP, DNS, authentication, certificates, and PKI-based access
- Experience with mailbox databases, transport services, journaling, archival/retention systems, and SMTP relays
- Experience with message hygiene tools and compliance/retention policies
- Experience performing backup, recovery, and failover operations for Exchange and messaging components
- Familiarity with patching, vulnerability remediation, SCAP, and configuration compliance for messaging platforms
- Ability to diagnose and resolve complex hybrid messaging, routing, and mobile client issues
- Strong documentation, communication, and cross-team collaboration skills
- Onsite work at specified US locations
General Dynamics Information Technology Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about General Dynamics Information Technology and has not been reviewed or approved by General Dynamics Information Technology.
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Affordable Benefits — Pay and benefits are described as good or okay in multiple places, and the overall package is often portrayed as acceptable even when base pay is not viewed as top-tier.
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Healthcare Strength — Medical, dental, and vision plan options are presented as comprehensive, with additional protections like disability and life insurance contributing to a well-rounded health and protection offering.
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Retirement Support — A 401(k) plan with company match is consistently highlighted as part of the total rewards package, supporting longer-term financial planning.
General Dynamics Information Technology Insights
What We Do
We are GDIT. The people supporting some of the most complex government, defense, and intelligence projects across the country. We deliver. Bringing the expertise needed to understand and advance critical missions. We transform. Shifting the ways clients invest in, integrate, and innovate technology solutions. We ensure today is safe and tomorrow is smarter. We are there. On the ground, beside our clients, in the lab, and everywhere in between. Offering the technology transformations, strategy, and mission services needed to get the job done.
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