Microsoft 365​/SharePoint Administrator; IT Customer Support Services

Location:

Quantico, VA (Hybrid with Remote Work Eligibility)
Company: G2IT

Clearance Required:

Active Secret

Schedule:

Full-Time | Hybrid | Up to 10% Travel
Salary Range: $75,000–$85,000 annually, depending on experience and qualifications

G2IT is seeking an experienced Microsoft 365 / SharePoint Administrator to support and maintain an enterprise collaboration environment serving more than 13,000 users across NIPRNet, SIPRNet, and planned JWICS environments for a Department of War agency. The Microsoft 365 / SharePoint Administrator will be responsible for administering Microsoft 365 services, including SharePoint Online, Microsoft Teams, Exchange Online, and One Drive. This position will focus on collaboration platform administration, user access management, system performance, security compliance, and troubleshooting complex technical issues.

The ideal candidate will have experience managing Microsoft 365 and SharePoint environments, supporting enterprise endpoint management solutions, and maintaining secure systems in accordance with DoD cybersecurity requirements. This position requires collaboration with government stakeholders, technical teams, and vendors to ensure the availability, security, and performance of enterprise collaboration services.

• Administer and maintain Microsoft 365 services, including SharePoint Online, Microsoft Teams, Exchange Online, and One Drive.
• Manage SharePoint Online site provisioning, permissions, access controls, hub sites, and site architecture.
• Configure and maintain Microsoft Teams policies, governance settings, and collaboration services.
• Administer Microsoft Purview retention policies, compliance settings, and data governance controls.
• Monitor Microsoft 365 service health, troubleshoot platform issues, and provide Tier II/III technical support.
• Coordinate technical escalations with Microsoft and other vendors to resolve complex system issues.
• Administer Zoom.gov and Adobe Connect accounts, security configurations, and integrations.
• Support Microsoft Power Platform governance, including environment administration, connectors, and data loss prevention policies.
• Implement Microsoft 365 configuration changes, feature updates, and service enhancements through formal Change Management processes.
• Maintain system documentation, configuration records, and security compliance evidence supporting Risk Management Framework (RMF) requirements.
• Ensure Microsoft 365 and collaboration services comply with applicable DISA STIGs and DoD cybersecurity policies.
• Collaborate with technical teams to maintain service availability, system performance, and operational continuity.

• Administer and maintain enterprise endpoint management solutions, including Microsoft Endpoint Configuration Manager (MECM/SCCM) and Microsoft Intune.
• Monitor endpoint management infrastructure, client health, software distribution, and compliance reporting across multiple security environments.
• Package, test, and deploy operating system updates, security patches, and third‑party applications.
• Monitor patch compliance and support remediation efforts in accordance with DoD security requirements.
• Develop and maintain standardized Windows operating system images that comply with applicable DISA STIG requirements.
• Support automated software deployment, system provisioning, and operating system imaging using task sequences and related tools.
• Maintain endpoint configuration documentation and assist with vulnerability remediation and compliance reporting.

• Bachelor's degree and a minimum of 3 years of related experience. An additional 4 years of relevant experience may be substituted for the degree.
• Must be a U.S. Citizen.
• Must possess an active DoD Secret clearance (favorably adjudicated T3/T3R).
• Must possess and maintain a current DoD 8570/8140 IAT Level II certification, such as CompTIA Security+ CE, CySA+, GSEC, SSCP, or CCNA-Security.
• Minimum of 3 years of experience administering Windows endpoint environments supporting 5,000+ devices.
• Experience administering or supporting enterprise Microsoft 365 environments, including SharePoint Online, Microsoft Teams, Exchange Online, and One Drive.
• Experience managing SharePoint permissions, site configurations, user access, and collaboration services.
• Hands‑on experience with Microsoft Endpoint Configuration Manager (MECM/SCCM) and/or Microsoft Intune.
• Experience with software deployment, operating system patching,…