Systems Engineer - Microsoft Exchange (TS/SCI)

Job Description

Job Description

Location: Washington, DC (On-Site, SCIF)
Clearance Required: Active Top Secret with SCI eligibility
Employment Type: Full-Time
Industry: Federal/Defense, Information Technology, Cybersecurity

About the Role

We are seeking an experienced Systems Engineer specializing in Microsoft Exchange to support a mission-critical federal program for the U.S. Department of the Treasury. This position supports Tier 3 Data Center Operations within the Treasury Foreign Intelligence Network (TFIN), a high-security classified environment operating 24/7.

This role is ideal for a Microsoft Exchange engineer who thrives in complex enterprise environments and is comfortable working fully on-site in a SCIF.

What You’ll Do

Core Exchange Engineering & Administration

• Administer and maintain a multi-site Microsoft Exchange 2019 / SE enterprise environment.

• Monitor Exchange system health, including:

  • Transport pipelines

  • Mailbox/database performance

  • DAG replication and availability

• Perform PowerShell scripting for automation, mailbox optimization, system auditing, and reporting.

• Manage Exchange backups, disaster recovery, and COOP readiness.

• Administer and support Exchange Hybrid infrastructure for coexistence with Microsoft 365.

Operational Support & Lifecycle Management

• Perform Exchange patching, cumulative updates, version upgrades, and general lifecycle maintenance.

• Ensure compliance with cybersecurity and governance frameworks, including:

  • Treasury Baseline Classified System standards

  • STIGs

  • FISMA

  • NIST 800-53

  • ICD 503

  • CNSSI 1253

Documentation, Knowledge Management & Training

• Create and maintain:

  • Technical SOPs

  • Exchange configuration documents

  • Knowledge base articles

  • Technical diagrams and workflows

• Provide cross-training to engineering and support staff as needed.

Reporting Requirements

Provide input for recurring government deliverables, including:

• Daily Exchange health status checks

• Weekly operations and security summaries

• Monthly uptime and performance reporting

• Ad hoc incident reports, AARs, and change request documentation

Collaboration

Work closely with:

• Server, Network, and Telecom teams

• Development staff

• Tier 1–3 Help Desk personnel

• Data Center Operations Engineering
  Support escalations and troubleshooting of complex technical issues across the enterprise.

After-Hours Support

• Participate in a scheduled on-call rotation for after-hours, weekend, and emergency support.

• Must be able to respond within 60 minutes and report on-site within 90 minutes when required.

What You Bring

Required Qualifications

• Active Top Secret clearance with SCI eligibility (SSBI within the last 7 years).

• Hands-on engineering experience with:

  • Microsoft Exchange 2013/2016/2019/SE

  • Exchange Hybrid

  • DAG management and troubleshooting

• Strong proficiency with PowerShell for automation and enterprise administration.

• Experience with disaster recovery and enterprise backup solutions.

• Understanding of federal cybersecurity compliance frameworks.

Preferred Qualifications

• Experience supporting classified federal environments or intelligence community systems.

• Familiarity with VMware, Citrix, AWS/Azure, and DoD cybersecurity tools (HBSS, ACAS).

• IAT-II/IAT-III certifications: Security+, CASP, CISSP, etc.

Company DescriptionTenacity Solutions, LLC (Tenacity) is a Service-Disabled Veteran Owned Small Business (SDVOSB) founded by our CEO, Gabriel Brown, CAPT, USN (Ret). Tenacity is an innovative company, leveraging talent, skill, and knowledge with cutting-edge and proven practices to deliver solutions and products that exceed customers’ requirements and surpasses their expectations. Tenacity immediately has become a leading technology and management solutions provider with a mission to advance healthcare services for specialized populations including Veterans and their families. Headquartered in North, Bethesda, Maryland (DMV), our talented resources are located across the United States. We bring diverse talent to design solutions that help customers with their greatest challenges.

Company Description

Tenacity Solutions, LLC (Tenacity) is a Service-Disabled Veteran Owned Small Business (SDVOSB) founded by our CEO, Gabriel Brown, CAPT, USN (Ret). Tenacity is an innovative company, leveraging talent, skill, and knowledge with cutting-edge and proven practices to deliver solutions and products that exceed customers’ requirements and surpasses their expectations. Tenacity immediately has become a leading technology and management solutions provider with a mission to advance healthcare services for specialized populations including Veterans and their families. Headquartered in North, Bethesda, Maryland (DMV), our talented resources are located across the United States. We bring diverse talent to design solutions that help customers with their greatest challenges.