Sr. M365 Systems Administrator 00000381

Job Description

Job Description

Apply now : Sr. M365 Systems Administrator, location is Hybrid (Herndon, VA). The start date is September 1, 2025 for this 12-month contract position with potential extension or conversion.

Job Title : Sr. M365 Systems Administrator

Location-Type : Hybrid - Herndon, VA (3 days onsite)

Start Date Is : September 1, 2025

Duration : 12 months (Contract, potential extension and conversion)

Compensation Range : $65.00 / hr – $80.00 / hr

Job Description :

Lead enterprise-level Microsoft 365 administration, modernization, and security initiatives, ensuring platform reliability, compliance, and adoption across the organization.

Day-to-Day Responsibilities :

Lead Microsoft 365 upgrades, migrations, and modernization projects

Architect, configure, and maintain secure and resilient M365 services (Exchange Online, SharePoint Online, Teams, OneDrive, M365 Admin Center)

Implement best practices for identity, access, and compliance policies (Conditional Access, DLP, Sensitivity Labels, Defender for Office 365)

Manage tenant-level configurations, hybrid integrations, and licensing strategies

Monitor system health, usage, and compliance via PowerShell, Graph API, and compliance dashboards

Develop governance standards, documentation, and disaster recovery procedures

Mentor junior team members and provide escalation support for complex M365 issues

Evaluate emerging Microsoft 365 technologies and make adoption recommendations

Provide end-user guidance and training to promote adoption of new capabilities

Requirements : Must-Haves :

5–7 years of M365 administration / engineering

• Experience with M365 implementations
• Knowledge of Exchange Online, SharePoint Online, Teams, OneDrive, Azure AD, and security / compliance features
• Advanced Power Platform experience (Power BI, Power Apps, Power Automate)
• PowerShell scripting and Graph API skills

Nice-to-Haves :

Microsoft certifications (MS-100, MS-101, SC-300, or equivalent)

SharePoint 2013 administration / customization

Familiarity with Defender for O365, Conditional Access, Sensitivity Labels, and DLP

Security auditing, tenant hardening, and compliance configuration experience

Knowledge of networking, HTML, JavaScript, and SQL Server