Exchange Subject Matter Expert - TS​/SCI

Exchange Subject Matter Expert - TS/SCI Required

Location:

Washington, DC (On-site)
Clearance: TS/SCI

Description:

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.

Responsibilities:

Exchange Architecture, Administration, and Migration

• 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

Security, Compliance, and Reliability

• 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

Collaboration, Documentation, and Technical Guidance

• 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

Required Qualifications:

• 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

Desired /

Preferred Qualifications:

• 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

Education &

Certifications:

• 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

About Metric5
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 package, continuous professional development, with a best in class company culture that is enjoyable to work in and supports the growth of each of our professionals.
Our benefits include:

• Health & Dental Insurance with 100% of individual coverage paid for by the company
• Vision Insurance
• Life & Short Term Disability Insurance
• 401K with company match (employees are immediately vested)
• Paid Vacation
• 9 Paid Holidays per year (plus 2 paid floating holidays)
• Professional Development Reimbursement Program
• Tuition Assistance Program

Metric5 is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.