Sr. M365 Systems Administrator 00000381

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