Senior Microsoft 365 Administrator

Senior Microsoft 365 Administrator

Location: Herndon, VA (Hybrid – 3 days/week onsite)
Security Clearance: Ability to obtain a U.S. government security clearance.
Company: AiGenius
Employment Type: W2 Contract (Possible Conversion)

About the Role

AiGenius is seeking a Senior Microsoft 365 Administrator to serve as the technical lead and subject matter expert for a major enterprise client. The role is responsible for the architecture, implementation, governance, and optimization of the Microsoft 365 environment, supporting modernization initiatives and ensuring security, reliability, and scalability across the platform.

This position requires deep hands-on Microsoft 365 expertise, excellent cross-functional collaboration, and the ability to lead enterprise-level initiatives across Exchange Online, SharePoint, Teams, OneDrive, Azure AD, and security/compliance features.

Key Responsibilities

• Lead and execute Microsoft 365 upgrades, migrations, and modernization efforts
• Architect, configure, and manage Microsoft 365 services including:
• Exchange Online
• SharePoint Online
• Teams
• OneDrive
• M365 Admin Center
• Implement and enforce best practices around identity, access, and compliance including:
• Conditional Access
• Data Loss Prevention (DLP)
• Sensitivity Labels
• Defender for Office 365
• Serve as the technical lead for M365-related projects and collaborate with IT, Security, and business teams
• Manage tenant-wide configurations, hybrid integrations, and licensing strategy
• Monitor health, performance, and security using PowerShell, Graph API, and the Security & Compliance Center
• Develop governance policies, documentation, and disaster recovery procedures
• Provide mentorship and handle escalations for complex issues
• Evaluate emerging Microsoft 365 technologies and recommend strategic adoption
• Deliver end-user communication and training on new features to improve adoption

Qualifications

• Bachelor's Degree in Computer Science, MIS, or related field (or equivalent experience)
• 5–7+ years of hands-on Microsoft 365 administration and engineering experience in enterprise environments
• Proven experience leading M365 implementations, migrations, or major configuration projects
• Strong expertise in:
• Exchange Online
• SharePoint Online
• Microsoft Teams
• OneDrive
• Azure AD
• Microsoft 365 Security & Compliance
• Advanced Power Platform experience (Power BI, Power Apps, Power Automate)
• Strong PowerShell scripting and Graph API familiarity
• Experience leading cross-functional initiatives and interacting with senior leadership
• Excellent communication, documentation, and organizational skills
• Deep understanding of hybrid M365 + on-prem Active Directory environments
• Knowledge of AI-enhanced capabilities within Microsoft 365

Desired Skills

• Microsoft certifications such as MS-102, SC-401, or equivalent
• SharePoint Online administration and customization experience
• Experience implementing Defender for Office 365
• Expertise in:
• Sensitivity Labels
• Information Protection
• DLP for email, endpoints, and cloud apps
• Data Governance experience:
• Retention Labels
• Records Management
• Audit Logs
• Ability to monitor and respond to compliance alerts using Microsoft Purview
• Automation and scripting using PowerShell, JavaScript/TypeScript, Graph API (REST/SDK), JSON

Pay: $112, $138,446.38 per year

Benefits:

• 401(k)
• Dental insurance
• Health insurance
• Life insurance
• Paid time off
• Professional development assistance
• Vision insurance

Work Location: Hybrid remote in Herndon, VA 20171