Company
Silverstar Consulting GmbH is an independent IT consultancy for Microsoft technologies, founded in 2005 and based in Bayreuth, Germany. Founder and managing director Robert Kettel works directly in client projects as solution architect and technical project manager.
At a glance
- Founded
- 2005
- Based in
- Bayreuth, Germany
- Managing director
- Robert Kettel
- Industries
- Insurance and financial services, automotive and manufacturing, energy, IT and telecommunications
- Delivery
- Europe (remote); on-site primarily in the DACH region
- Project languages
- German and English
Selected projects
- 2021 – 2026Global insurance group
Global Workplace Transformation Program: migration of the workplace services of 20 subsidiaries into the central Microsoft 365 tenant (more than 20,000 users) – M&A assessments, architecture, planning, steering nearshore and offshore teams.
- 2019 – 2021Commercial insurer
Group-wide modern workplace pilot (approx. 8,000 users); Exchange hybrid migrations for more than 9,000 mailboxes; tier-0 domain controller setup.
- 2018 – 2019International assistance provider
Group-wide tier-0 administration model; consolidation of more than 30 Active Directory domains into 4 (12,000 users).
- 2018Private university group
Consolidation of six tenants into one target tenant (approx. 25,000 accounts), PowerShell automation of the migration.
- 2016 – 2017International industrial group
New application relaying concept for the mail service; migration of Exchange to the split permissions model.
- 2005 – 2015Enterprise clients, incl. DAX-listed groups and banks
Exchange migration with approx. 80,000 mailboxes; Active Directory forest migration with approx. 150,000 users; Active Directory forest recovery at banks and an automotive manufacturer, including tests and training.
Your contact
Robert Kettel
Founder and managing director · Solution architect
My main topics are transformations based on Microsoft technology: tenant-to-tenant migrations, cloud adoption or moving to Microsoft's agentic AI portfolio with Microsoft 365 Copilot and Microsoft Foundry. I also help organisations get their Microsoft 365 environment ready for Copilot and AI.
For more than 20 years I have worked as a solution architect and IT project manager on Microsoft projects. In 2026 I completed a dedicated upskilling phase, including Microsoft's Frontier Transformation Engineer programme. I build agents with Copilot Studio and Microsoft Foundry in hands-on labs; my project delivery experience lies in the foundations Copilot depends on: identity, permissions and data governance.
Current certifications
Microsoft Certified: Agentic AI Business Solutions Architect Expert (AB-100)
Microsoft Certified: Azure Solutions Architect Expert (AZ-305)
Microsoft Certified: Information Security Administrator Associate (SC-401)
Microsoft Certified: Azure AI Apps and Agents Developer Associate (AI-103)
Microsoft Certified: Azure Security Engineer Associate (AZ-500)
Microsoft Certified: Azure Administrator Associate (AZ-104)
GitHub Copilot (GH-300)
Frontier Transformation Engineer
TOGAF 9.2
IT4IT Foundation