Provide senior-level administration, governance execution, and technical enablement across Microsoft 365, with a primary focus on Power Platform, Copilot, and secure application integrations. This role ensures that low-code solutions, AI capabilities, and third-party integrations are implemented in a secure, supportable, and scalable manner while enabling business innovation and process improvement. The Senior Microsoft 365 Administrator operates within established architectural standards and governance guardrails and serves as a technical lead for Power Platform administration and Copilot enablement activities. The role balances platform governance with hands-on support for solution owners. Job Duties and Responsibilities Provide senior-level administration and governance execution across Microsoft 365, with primary responsibility for Power Platform, Copilot, and application integrations Administer Microsoft Entra ID application integrations, including app registrations, enterprise applications, API permissions, consent policies, and service principals Govern application and integration lifecycle management to ensure secure, supportable, and compliant access to Microsoft 365 services Review, onboard, and maintain third-party and internal application integrations in alignment with established architectural standards and security requirements Partner with application owners and business solution teams to design and implement secure authentication and authorization patterns Administer Microsoft Power Platform, including environment strategy (development, testing, production), capacity monitoring, usage analysis, and solution lifecycle management Enforce Power Platform governance controls to prevent unmanaged low-code sprawl while enabling approved business solutions Support promotion of Power Platform solutions from development through production and provide operational support for production solutions Serve as the technical enablement lead for Microsoft Copilot within Microsoft 365 Assist business teams and solution owners with Copilot agent design, AI-assisted workflows, and business-specific Copilot use cases Translate business requirements into secure, reusable Copilot and Power Platform solutions aligned with governance and compliance standards Promote responsible, secure, and scalable AI usage patterns across the organization Serve as an escalation point for complex Microsoft 365 issues related to automation, integrations, and AI-enabled solutions Create and maintain technical documentation, standards, and operational runbooks related to Power Platform, Copilot, and application integrations Provide guidance and enablement to junior administrators and business solution owners Partner with identity, security, infrastructure, and compliance teams to ensure consistent service delivery and governance alignment Identify opportunities for platform improvements, automation, and increased Microsoft 365 maturity Accurately document work, configurations, and changes in ticketing and change management systems * Perform other duties as assigned