Onsite Service Cluster Manager – Microsoft 365 Messaging & Voice

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About the role

  • Service Cluster Manager overseeing Microsoft 365 Messaging & Voice Services for Carl Zeiss AG. Managing team responsibilities and ensuring compliance and governance across services.

Responsibilities

  • End-to-end responsibility for Microsoft 365 Messaging & Voice services, including tenant administration (Exchange Online, Teams Voice, Security & Compliance).
  • Management and optimization of M365 policies (e.g., Conditional Access, DLP, MFA) and license management.
  • Ensuring compliance and governance (audits, ISO, ITGC) and implementing security best practices.
  • Monitoring and reporting via Microsoft 365 Admin Center, PowerShell and, where applicable, third-party tools.
  • Technical leadership and management of a four-person team in Microsoft 365 Messaging & Voice.
  • Technical and organizational support for mergers & acquisitions related to email and telephony — including integration and extraction of services into/from the Microsoft 365 tenant.
  • ITIL-based service management including incident, problem, change and service request management for Microsoft 365 communication services.
  • Further development and strategic alignment of Microsoft 365 Messaging & Voice services.
  • Application of encryption services for Exchange to ensure confidential communication.
  • Patch management for messaging and voice components within the Microsoft 365 environment.
  • Monitoring service quality using defined KPIs and managing external providers to ensure agreed SLAs.
  • Global operation of services and rollout to new locations.
  • Management and coordination of multiple external providers.

Requirements

  • Deep expertise in Microsoft 365 administration (Exchange Online, Teams Voice, Azure AD) and relevant professional experience.
  • Degree in Business Informatics or a comparable field.
  • Experience with PowerShell automation for Microsoft 365 services.
  • Knowledge of security and compliance features (e.g., Purview, Conditional Access, MFA).
  • Experience applying ITIL processes in operational production.
  • Knowledge of encryption technologies for Exchange and Microsoft 365.
  • Experience managing external service providers and KPI-based quality management.
  • Certifications such as MS-102 (Microsoft 365 Administrator), MS-700 (Teams Administrator), SC-300 (Identity & Access) and ITIL Foundation or higher-level ITIL certifications.
  • Experience with telephony technologies is desirable.

Benefits

  • Diversity is part of ZEISS.
  • Professional development opportunities.

Job title

Service Cluster Manager – Microsoft 365 Messaging & Voice

Job type

Experience level

Mid levelSenior

Salary

Not specified

Degree requirement

Bachelor's Degree

Tech skills

Location requirements

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