Microsoft Exchange & Messaging Engineer - TS/SCI with Polygraph

Company: GD Information Technology
Location: Chantilly
Posted on: April 1, 2026

Job Description:

Type of Requisition: Regular 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: Microsoft Exchange Server, Operating Systems (OS), Systems Design Certifications: None Experience: 15 years of related experience US Citizenship Required: Yes Job Description: We are seeking highly motivated Microsoft Exchange and Messaging engineers and architects with a thirst for learning, in support of a geographically dispersed, state of the art systems that seamlessly integrate Microsoft services. Candidates with proven depth creating solutions with Microsoft Windows Server will be positioned for success in our organization. The selected candidate will design, build and deploy, and administer large scale multi-domain enterprise Windows Server environments. Additionally, engineers will build, maintain and migrate a variety of physical and virtual systems to on-premises, cloud, or hybrid infrastructures. Engineers will provide support to multiple globally dispersed WAN connected sites. Embracing the DevOps model, engineers will be responsible for supporting their solutions throughout the entire IT project lifecycle, to include refining requirements, creating design documentation, creating installation instructions and deployment plans, and providing O&M support. Project assignments will vary based on skill level, and may include engineering geographically dispersed services, integrating services into public, private and hybrid cloud environments, engineering solutions to be deployed via automated CM tools, and hardening the solutions to address security and SCAP compliance. Responsibilities: Designs and defines system architecture for new or existing Exchange systems utilizing both on-premises and cloud-based hosting technologies Evaluate the current Exchange environment, develop platform roadmaps, analyze system performance, and recommend corrective and preemptive actions Administer, operate, manage and maintain Exchange components for on-premises and cloud-based virtualized systems Reviews completion and implementation of system additions and/or enhancements and makes recommendations to management and/or clients Plans and directs upgrades of Microsoft Exchange infrastructure and related components in the area of Active Directory, Domain Controller topology, LDAP, Authentication Services, DNS, Permissions and Access Controls and Group Policy Required Skills: Experience with Exchange Server 2016 or 2019, including Database Availability Groups (DAGs) Experience with managing mail flow in a Microsoft Exchange environment Experience email security, compliance policies, and data loss prevention (DLP) Experience with email encryption, SPF / DKIM / DMARC, and other security measures Experience with Windows DNS and DHCP Experience integrating Exchange with Active Directory, Azure AD, and Office 365 services Experience with Active Directory Domains and Trusts Experience with Microsoft Windows automation scripting with PowerShell or other scripting languages Experience with Windows Server 2019, 2022 and 2025 Experience with Microsoft Identity Manager and/or Forefront Identity Manager experience is optimal Experience with managing work tasks via tools such as JIRA and ServiceNow System configuration experience and hardening based on security guidelines, such as DISA STIGs CompTIA Security or similar for IAT Level II DoD 8570/8140 certification BA/BS (or equivalent experience) TS/SCI with Polygraph Location: On Customer Site US Citizenship Required 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. GDITcareers OpportunityOwned WeAreGDIT transitioningmilitary clearedjobs veterans Autobots The likely salary range for this position is $164,382 - $218,500. 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: 40 Travel Required: None T elecommuting Options: Onsite Work Location: USA VA Chantilly Additional Work Locations: 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. 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 30,000 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 at gdit.com/tc . Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

Keywords: GD Information Technology, Bowie , Microsoft Exchange & Messaging Engineer - TS/SCI with Polygraph, IT / Software / Systems , Chantilly, Maryland