Exchange Subject Matter Expert - TS​/SCI

Metric5 Exchange Subject Matter Expert (TS/SCI)

Location:

Washington, DC (On-site)

Clearance: TS/SCI

Metric5 is seeking a highly experienced Exchange Subject Matter Expert (SME) to support the Cloud Team, providing technical leadership for the administration, modernization, and migration of Microsoft Exchange in a classified environment. This role will serve as the primary Exchange authority, supporting a mission‑critical on‑premises Exchange infrastructure and leading efforts to transition to Exchange Online via a hybrid deployment model.

The ideal candidate will have deep, hands‑on experience supporting Exchange in classified environments, with a strong understanding of the constraints associated with classified networks and a proven ability to plan and execute Exchange hybrid configurations and migrations.

This is a hands‑on engineering role requiring on‑site presence five days per week at the client location in Washington, DC.

• Serve as the technical lead and SME for Microsoft Exchange in a classified environment
• Administer, maintain, and troubleshoot on‑premises Exchange Server (2016/2019 or equivalent)
• Design, implement, and support Exchange hybrid configurations to enable migration from on‑prem Exchange to Exchange Online
• Lead planning and execution of mailbox, service, and configuration migrations to Exchange Online while minimizing operational risk
• Manage mail flow, transport rules, certificates, DAGs, and high availability configurations
• Perform Exchange upgrades, patching, and lifecycle management

• Ensure Exchange configurations comply with STIGs, RMF, and organizational security requirements
• Partner with cybersecurity teams to implement secure authentication, certificate management, and access controls
• Support audits, vulnerability remediation, and continuous compliance efforts in classified environments
• Lead troubleshooting and resolution of complex Exchange‑related incidents and outages

• Collaborate with Cloud, systems, and cybersecurity teams, as well as customer stakeholders, to align Exchange solutions with mission needs
• Provide technical recommendations, risk assessments, and migration strategies to leadership and the customer
• Develop and maintain architecture documentation, SOPs, and operational runbooks
• Serve as a trusted technical advisor for Exchange‑related decisions and modernization efforts

• Active TS/SCI clearance (required)
• 8+ years of hands‑on experience administering Microsoft Exchange in enterprise environments
• Strong experience supporting Exchange in classified, high‑side, or air‑gapped networks
• Proven experience designing and implementing Exchange hybrid environments and migrating from on‑prem Exchange to Exchange Online
• In‑depth knowledge of Exchange Server architecture and administration
• Experience with Active Directory and identity integration
• Knowledge of mail flow, transport rules, and security controls
• Experience with certificates, PKI, and authentication mechanisms
• Strong troubleshooting skills and ability to operate as the Exchange technical authority

• Experience with Exchange STIG implementation and RMF processes
• Power Shell scripting for Exchange administration and automation
• Experience supporting highly available, mission‑critical messaging environments
• Prior experience advising government customers or senior leadership on Exchange strategy and risk

• Bachelor's degree in Information Technology, Computer Science, or a related field, or equivalent experience
• Microsoft Exchange, Microsoft 365, or security‑related certifications preferred

Years of

Experience:

8+ years of relevant experience

Location:

Washington, DC (On‑site)

Clearance: TS/SCI

Metric5 is a small business with big company benefits. We have a passionate team of smart, fun, caring professionals, and we are here for the long haul. Join our growing team in a business where your contributions make an enormous impact. Our organization offers a comprehensive employee benefits…