Exchange System Administrator SME

Leidos•Alexandria, VA

About The Position

Leidos is seeking an Exchange Subject Matter Expert to support a large enterprise IT contract for the Department of Defense. The role provides systems and software administration in a large, multi-enclave enterprise environment and supports on-premises Microsoft Exchange, Exchange Online, and hybrid deployments. Solutions may span different security classifications, sizes, redundancy and resiliency needs, and mission requirements. The SME conducts technical planning for hardware and software upgrades; reviews implementation and upgrade guides; develops standard operating procedures and other operational documentation; and works with operations staff on requirements and timelines. The role also supports technical assessments, integration, system testing for functionality and security compliance, and quality assurance of production implementations. The administrator works collaboratively to meet mission needs and maintain customer-facing capabilities, including by performing software configuration, server reboots, and other remedial actions. This position supports a 24/7/365 mission environment and may require on-call support for after-hours outages. It includes Tier 2/Tier 3 administration, incident and problem analysis, Exchange Online oversight in an Office 365 hybrid/cloud environment, and management of roles, services, and permissions in accordance with government service-owner and cybersecurity requirements. The position requires U.S. citizenship and a TS/SCI clearance with the specified polygraph, or TS/SCI and willingness to obtain and maintain a polygraph.

Requirements

U.S. citizenship.
TS/SCI with the specified polygraph, or TS/SCI and willingness to obtain and maintain a polygraph.
A Bachelor's degree with 12 years of relevant experience, a Master's degree with 10 years, an Associate's degree with 14 years, or a high school diploma with 16 years.
At minimum, a DoDM 8140.03 (formerly DoD 8570) IT System Administrator Intermediate certification, such as Cloud+, GICSP, SSCP, Security+ CE, GSEC, or higher.
Experience working with service lanes to handle service inquiries and problems.
Extensive experience as a Tier 2/3 System Administrator.
Extensive experience with Office 365 and Microsoft Exchange 2016, 2019, and 2025 SE.
Extensive knowledge of email journaling solutions.
Extensive experience with Exchange PowerShell or other scripting languages for scripting and automation.
Experience resolving highly complex problems using technical knowledge, factual reasoning, and interpretation of problem indicators.
Experience developing and implementing solutions for upgrades to newer Exchange versions.
Experience directing migrations between on-premises Exchange and Microsoft 365 Exchange Online.
Time-management skills and ability to work independently within an IT service management/ticketing system such as ServiceNow.
Strong oral and written communication skills, including experience briefing senior government and military officials.
Leadership and mentoring skills to guide and improve team capabilities.
Ability to work effectively in a team and support peers in improving processes and results.
Ability to triage and classify incidents and prioritize work accordingly.
Extensive experience planning, deploying, and documenting patch and configuration updates.
Extensive knowledge of disaster recovery and high availability for large, dispersed enterprise environments.
Extensive experience with log reviews, incident analysis, issue-trend identification, and problem analysis.
Experience with server/system patch management methodologies.

Nice To Haves

Microsoft Certified Solutions Expert (MCSE) or Microsoft Certified System Administrator (MCSA) certification.
Experience troubleshooting in a Trellix/Windows Defender security environment.
Experience with backup and restore procedures using NetBackup, VMware snapshots, or other backup solutions before major changes or upgrades.

Responsibilities

Provide Tier 2/Tier 3 administration, implementation, troubleshooting, maintenance, and monitoring for physical and virtual servers.
Plan hardware and software upgrades, review implementation and upgrade guides, and develop standard operating procedures and other operations documentation.
Perform requirements, functional, and allocation analyses with operations staff to meet customer upgrade timelines.
Conduct technical assessments, integration support, system testing for functionality and security compliance, and quality assurance of production implementations.
Perform technical software configuration, server reboots, and other remedial actions, including remotely logging into servers as needed.
Distinguish isolated user issues from enterprise-wide application and system problems; advise operations staff on root causes and recommended fixes, and document resolutions.
Collaborate with peers and service lanes on network latency analysis to address slow connections and user experience issues.
Collect data, analyze problems, and develop and implement solutions consistent with Problem Management guidelines.
Establish and maintain availability and capacity management solutions using lessons learned and best practices.
Provide follow-up reports on technical findings, feedback, and resolution steps for root cause analysis, operational assessments, and process improvement.
Support customer requirements in a 24/7/365 mission environment and provide on-call support during after-hours outages.
Update operations and monitoring documentation for 24/7/365 IT Operations Center personnel.
Troubleshoot email routing and service disruptions affected by cybersecurity tools and policies while ensuring implementation and integration do not affect customers.
Oversee day-to-day Exchange Online operations in an Office 365 hybrid/cloud environment.
Manage roles, services, and permissions according to Government Service Owner and Cyber Security mandates.
Create, test, and implement PowerShell scripts to automate and standardize routine tasks and monitoring.
Plan, deploy, and document patch and configuration updates; support server and system patch management.
Support Exchange upgrades and migrations between on-premises Exchange and Exchange Online.
Review logs, analyze incidents, identify trends, and conduct problem analysis.
Triage and classify incidents, prioritize work, and use the ServiceNow IT service management/ticketing system.
Communicate with senior government and military officials and mentor team members.