Senior Exchange & M365 Systems Engineer

00100 LEIDOS, INC.; Alexandria (VA); On-site; USD 116,000 - 210,000; Full time

Job summary

Leidos is seeking a Senior Exchange Administrator to support a large enterprise IT contract for the DoD. The role covers on-prem Exchange 2019/2025 SE, M365 Exchange Online, and hybrid deployments. You will perform planning, implementation reviews, and RMF ATO-related documentation in a mission-critical environment.

Responsibilities include 24/7/365 operations, on-call during outages, PowerShell automation, and incident management using ServiceNow. A TS/SCI with polygraph clearance is required.

Qualifications

• Experience working as a Tier 2 System Administrator.
• Experience with Microsoft Exchange 2019, 2025 SE, and M365 Exchange Online.
• Experience with Email Journaling solutions.
• Experience scripting/automation through Exchange PowerShell or other scripting languages.

Responsibilities

• Provide Tier 2 Operations & Maintenance support for physical and virtual servers.
• Perform data collection, analysis, and root-cause determination.
• Document resolution steps and communicate findings to leadership.
• Manage Exchange Online in an Office 365/M365 hybrid environment.

Skills

Tier 2 O&M

Exchange 2019/2025 SE

M365 Exchange Online

PowerShell scripting

Troubleshooting complex problems

Education

Bachelor's degree with 12 years of relevant experience

Master’s degree with 8 years

Associate's with 14 years

High School Diploma with 16 years

Tools

PowerShell

ServiceNow

SCCM

Job description

Leidos is seeking a Senior Exchange Administrator to support a large enterprise IT contract for the DoD. The role covers on-prem Exchange 2019/2025 SE, M365 Exchange Online, and hybrid deployments. You will perform planning, implementation reviews, and RMF ATO-related documentation in a mission-critical environment.

Responsibilities include 24/7/365 operations, on-call during outages, PowerShell automation, and incident management using ServiceNow. A TS/SCI with polygraph clearance is required.