Sr IT System Adminstrator - App & Collaboration

As part of the Workplace Technology Engineering team, the Sr IT System Admin - App and Collaboration Platform, is responsible for the administration, configuration, maintenance, security, and operational reliability of the Company’s enterprise collaboration platforms and related applications. This role serves as a senior escalation resource for Microsoft 365 and other assigned collaboration technologies, manages platform configurations and access, monitors service health, resolves complex operational issues, and implements approved changes and enhancements. This position partners with IT engineering, security, compliance, business stakeholders, and vendors to maintain reliable, secure, and well-documented services. The role may also maintain existing workflows, scripts, and integrations and identify opportunities for operational improvement. Specific Duties and Responsibilities • Administer and maintain assigned Microsoft 365 services, including SharePoint Online, Microsoft Teams, OneDrive, Exchange Online, Power Apps, and Power Automate. • Configure platform settings, administrative policies, permissions, security groups, and role-based access in accordance with approved IT and security standards. • Monitor platform health, service availability, capacity, system alerts, and vendor notifications; coordinate and execute appropriate operational responses. • Serve as a senior escalation resource for incidents and service requests involving collaboration platforms and related applications. • Troubleshoot complex configuration, access, performance, synchronization, and application integration issues, document findings, and resolutions. • Perform routine platform maintenance, upgrades, release validation, and administrative changes through established change-management processes. • Administer collaboration tools such as Microsoft Teams and Zoom and support approved department portals and intranet environments. • Manage user lifecycle activities and access changes for assi