Senior Exchange Administrator

Leidos is seeking a Senior Exchange Administrator to support a large enterprise IT contract for the DOD. This role requires an individual with expertise managing on-prem Microsoft Exchange solutions in small, medium, and large enterprise environments including physical and virtual server technologies and managing Microsoft M365 Exchange Online in a hybrid environment.

The Senior Exchange Administrator will conduct technical planning for hardware and software upgrades, review implementation and upgrade guides, and update documentation to support Risk Management Framework (RMF) Authority to Operate (ATO) and extension requests. They will perform requirements analysis, functional analysis, and requirements allocation with engineering and operations staff to meet customer's intended timeline for upgrades.

Key responsibilities include:

• Providing Tier 2 Operations & Maintenance (O&M) support for implementation, troubleshooting, maintenance, and monitoring for physical and virtual servers
• Collaborating with peers and other service lanes to perform network latency analysis to address slow connections and user experience issues
• Directing effort to collect data, conduct analysis, develop, and implement solutions using associated Problem Management guidelines
• Establishing and maintaining comprehensive availability and capacity management solution using lessons learned and best business practices
• Providing follow-up reports (technical findings, feedback, resolution steps taken) for root cause analysis, operational assessment, and process improvement initiatives
• Supporting customer requirements in a 24/7/365 mission environment and providing on-call support during outages occurring after hours
• Updating operations and monitoring documentation for 24/7/365 IT Operations Center watch personnel
• Troubleshooting email routing devices and security services (like McAfee/Trellix, Proofpoint, and Edge devices)
• Performing day-to-day oversight for Exchange Online system within an Office 365/M365 hybrid cloud environment
• Managing roles, services, and permissions in accordance with Government Service Owner and Cyber Security mandates
• Creating, testing, and implementing PowerShell scripts to automate and standardize routine tasks and monitoring
• Conducting data spill cleanups as directed by Cyber Security to mitigate spread of misclassified emails/attachments
• Conducting Freedom of Information Act (FOIA) searches spanning broad categories and large subsets of users using PowerShell and Microsoft-provided tools

The successful candidate will have:

• Experience with interacting with service lanes to handle service inquiries and problems
• Extensive experience working as a Tier 2 System Administrator
• Extensive experience with Microsoft Exchange 2019, 2025 SE, and M365 Exchange Online
• Extensive knowledge of Email Journaling solutions
• Extensive experience with Scripting/Automation through Exchange PowerShell or other scripting languages
• Experience resolving highly complex problems using application of technical knowledge, factual reasoning, and proper interpretation of problem indicators
• Experience developing and implementing solutions for upgrades to newer Exchange versions
• Experience directing migrations between on-prem Exchange and M365 Exchange Online
• Time management skills with the ability to work within an IT Service Management/ticketing system (ServiceNow) independently
• Strong oral and written communications skills to explain complex issues in a simplified manner for non-technical leadership and properly document root cause and restoration actions
• Mentoring skills to guide and improve team skill composition
• Track record of working effectively within a team, and support to peers toward improved processes and results
• Ability to triage and properly classify incidents and prioritize work efforts accordingly
• Experience with planning, deploying, and documenting patch and configuration updates
• Knowledge of Disaster Recovery for High Availability for a Large Environment
• Experience with log reviews, incident analysis, and identification of issue trends
• Experience with server patch management methodologies utilizing SCCM
• Candidate must, at a minimum, meet DoDM 8140.03 (previously DoD 8570) – IT System Admin Intermediate certification requirements (Cloud+, GICSP, SSCP, Security+ CE, GSEC, or higher)