• Administer Microsoft 365 (Exchange, SharePoint, Teams, OneDrive) including user lifecycle, licensing, permissions, mail flow, and governance. • Manage email security platforms (Proofpoint, Microsoft Defender), authentication standards (DMARC/DKIM/SPF), and DLP/anti phishing controls. • Monitor service health, manage incidents, coordinate escalations, and execute migrations, feature rollouts, and tenant configuration changes. • Support Microsoft 365 Copilot enablement including licensing, policy configuration, data governance, and adoption. • Administer Microsoft Entra ID including conditional access, SSO integrations, app registrations, authentication methods, and hybrid identity (Azure AD Connect/Cloud Sync). • Maintain and harden on premises Active Directory including replication, Sites & Services, OU delegation, and security benchmarks. • Manage Intune for MDM/MAM, Autopilot, configuration/compliance profiles, and Defender for Endpoint. • Implement MFA, passwordless authentication, PIM, and enforce endpoint security baselines across all device platforms. • Administer Microsoft Defender XDR components and Microsoft Purview (DLP, sensitivity labels, retention, information barriers). • Collaborate with IT Security on Sentinel alerting, automation, and tuning. • Support regulatory compliance (NCUA, FFIEC, GLBA) through configuration, evidence collection, access reviews, and audit preparation. • Perform security patching, vulnerability scanning support, incident response participation, and documentation for audits. • Administer Windows Server environments (AD, DNS, DHCP, Group Policy, file/print services). • Manage Hyper V virtualization, server provisioning, patching, hardening, and lifecycle management. • Maintain SAN/NAS storage, enterprise backups, and disaster recovery testing. • Support Azure networking, VPN connectivity, VLAN verification, and firewall rule coordination. • Administer RingCentral UCaaS including provisioning, call routing, IVR, and device support. • Troubleshoot voice quality and connectivity issues across sites. • Assist with basic network troubleshooting and hybrid connectivity components. • Develop automation using PowerShell, Graph API/SDK, and Power Automate; maintain scripts in version control. • Support change management, user adoption, and evaluation of new Microsoft features and security best practices. • Serve as Tier 2/3 escalation for infrastructure issues and maintain accurate ticketing and documentation. • Monitor systems and networks to proactively address alerts and performance issues. • Use AI powered tools to enhance productivity and operational efficiency. • Participate in maintenance windows, on call rotation, vendor collaboration, and cross training within the IT Infrastructure team. • Maintain runbooks, configuration guides, and knowledge base documentation. • Complete or participate in additional duties or projects as assigned by management