Systems Engineer, Senior (Senior Exchange Integration Engineer)

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret/SCI Clearance Level Must Be Able to Obtain: Top Secret/SCI Public Trust/Other Required: None Job Family: IT Infrastructure and Operations Job Qualifications: Skills: End to End Implementation, Escalation Resolution, Patch Testing Certifications: None Experience: 5 + years of related experience US Citizenship Required: Yes Job Description: General Dynamics is seeking a highly skilled Systems Integration & Production Engineer to join our mission-critical engineering team. In this role, you will bridge the gap between development and production, serving as the primary Subject Matter Expert (SME) for Microsoft Exchange across multiple isolated, high-security networks. You will architect, test, and validate configurations in a dedicated laboratory environment, and directly execute the strategic planning, rollout, and lifecycle maintenance across operational production environments. This role requires a unique balance of rigorous integration lab testing, high-impact Tier 3 escalation support, and strategic engineering planning. Additionally, you will act as a critical troubleshooting liaison for our enterprise users accessing Department of Defense cloud tenants ( DOD365-Joint and DOD365-SEC ), collaborating directly with external agency technicians to diagnose and isolate complex access issues impacting our workforce. You will also mentor lower-tier administrators to ensure maximum operational uptime. HOW A SYSTEMS INTEGRATION & PRODUCTION ENGINEER WILL MAKE AN IMPACT: Duties and Responsibilities End-to-End Exchange Architecture: Lead the strategic planning, architectural design, building, and deployment of Microsoft Exchange Server infrastructure in both integration labs and active production environments. Tier 3 Escalation Support: Serve as the ultimate escalation point for complex messaging and collaboration failures in production; perform deep-dive root cause analysis on highly classified networks. Patch Compliance & IAVA Testing: Conduct Information Assurance Vulnerability Alert (IAVA) testing on Exchange and System Center suites in the lab to validate that security patches do not impede production functionality before deployment. Cross-Domain Mail Flow: Maintain, configure, and optimize end-to-end mail flow across separated networks connected via specialized Email Guards; troubleshoot live operational routing anomalies. Automation & Monitoring: Write, maintain, and execute advanced automation scripts utilizing standard PowerShell and Exchange management cmdlets to automate production monitoring, health checks, and simulated mail flow. Workforce Mentorship & Documentation: Author and maintain comprehensive standard operating procedures (SOPs), deployment guides, and knowledge-base articles; provide technical training and guidance to Tier 1 and Tier 2 system administrators. DOD365 & DISA Troubleshooting Liaison: Assist enterprise users with complex DOD365-Joint and DOD365-SEC access issues. Gather technical data and collaborate directly with Defense Information Systems Agency (DISA) technicians to isolate, reproduce, and determine the scope of cloud-tenant anomalies impacting our local workforce (Note: Cloud tenant administration is managed externally). Infrastructure Integration: Configure and manage essential infrastructure dependencies required for production Exchange operations, including Active Directory (AD), Public Key Infrastructure (PKI), Group Policies, and Windows Server environments. WHAT YOU’LL NEED TO SUCCEED: Basic Qualifications Education: Bachelor’s degree in Systems Engineering, Computer Science, Information Technology, or a related field (or equivalent combination of education, technical training, and military/work experience). Experience: Minimum of 5–8 years of direct experience with Microsoft Exchange Server engineering, Windows Server administration, and enterprise-level production support. Security Clearance: Active Top Secret/SCI security clearance is required. U.S. Citizenship: Required due to the nature of the classified work environment. Required Skills & Technical Competencies Enterprise Messaging: Deep technical expertise in Microsoft Exchange Server architecture, database availability groups (DAG), transport pipelines, and client access protocols in large-scale production environments. Tier 3 Troubleshooting: Advanced diagnostics capability for complex system integration, identity management, and cross-domain communication failures. Directory & Security Infrastructure: Strong proficiency with Active Directory (identity management, schema extensions, replication), PKI (certificate lifecycle, encryption, signing), and Windows Server operating systems. Advanced Scripting: Mastery of PowerShell engineering, specifically utilizing Exchange management cmdlets and legacy cmdlets to build test scripts and custom monitoring frameworks. Technical Writing: Demonstrated experience creating clear deployment, migration, diagrams, and troubleshooting documentation for down-stream operations teams. Cloud-Liaison Capabilities: Strong analytical skills to diagnose client-side connectivity or authentication issues with Microsoft 365 / DOD365 enclaves, coupled with the ability to clearly articulate technical symptoms to external DISA support teams. Preferred Certifications & Experience Advanced Exchange Engineering: Proven track record of executing full-lifecycle Microsoft Exchange upgrades, schema updates, migrations, and complex disaster recovery procedures. Messaging Certifications: Legacy Microsoft Certified Solutions Expert (MCSE): Productivity (Messaging focus) or equivalent modern role-based Microsoft Exchange specializations. Performance Tuning: Direct experience with database health management, optimization of index structures, storage allocation, and transaction log troubleshooting for high-availability Exchange environments. Advanced Transport & Hygiene: Deep familiarity with Exchange transport rule architecture, message tracking logs, and deep packet evaluation of SMTP mail flow. DoD Baseline Compliance: DoD 8570 IAT Level II baseline certification (e.g., Security+ CE, CySA+, or higher). 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, competitive pay and paid time off Community: Award-winning culture of innovation and a military-friendly workplace #ARMA #CENTCOM/CITS The likely salary range for this position is $120,700 - $163,300. 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: Less than 10% T elecommuting Options: Onsite Work Location: USA FL MacDill AFB 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. 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 technology solutions 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 mission-ready capabilities in AI, cloud, cyber and software development. Join our Talent Community to stay up to date on our career opportunities and events at . Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans