Christoph Holzer
Managing Director; Senior IT Infrastructure & Cybersecurity Consultant
Experience
Managing Director; Senior IT Infrastructure & Cybersecurity Consultant
h2 IT-Solutions GmbH
- Employed full-time since July 2021
- IT strategy consulting, IT management consulting, IT personnel development and planning, interim IT management
- Designing and implementing virtualization solutions (VMware, Microsoft Azure, Citrix Xen, Proxmox, DataCore, NetApp)
- Software deployment (Microsoft Intune/Endpoint Manager), Microsoft Endpoint Manager migration projects
- Microsoft Exchange (Online M365, on-premises): review, design, and migration projects
- Infrastructure hardening after cyber attacks, consulting on cyber attack prevention, security testing
- End-to-end IT infrastructure design, technical project management
- Microsoft Active Directory, Group Policy Management, Windows Server 2012, 2016, 2019, 2022
- Designing and implementing hybrid infrastructures (on-premises, M365, Azure, Azure AD, Azure Virtual Desktop)
- Planning and executing technical measures for TISAX and ISO 27001
- Developing and enhancing IT security concepts, supporting the implementation of SIEM and SOAR solutions
- Supporting the development of disaster recovery concepts and backup strategies
Group Leader IT Operation Service
EOS GmbH
- Leading a team of 12 colleagues
- Responsible for global IT infrastructure operations
- Budget planning and monitoring
- Personnel development and training
- Responsible for BCM, disaster recovery, and operational IT security
- Responsible for IT infrastructure strategy and global infrastructure design
- Continuous development of global IT infrastructure, creating a global IT roadmap, cloud infrastructure (Azure, Citrix)
- IT project management
Deputy Head of IT Infrastructure
Tyczka GmbH
Leadership responsibility
Tyczka Energy GmbH
Senior IT System Administrator
Tyczka GmbH
Head of IT Infrastructure
Tyczka Totalgaz GmbH
- Technical responsibility for three team members in the IT infrastructure division
- Development and implementation of IT concepts and strategies
- Involvement in optimizing and monitoring the budget for the IT infrastructure department
- Responsibility for Active Directory, Ivanti DSM as well as vSphere 6.7, ESXi 6.7 and DataCore SanSymphony
- Conducting internal workshops/trainings for colleagues
- Project management for the takeover of IT infrastructure of acquired companies (M&A) (2019–2020)
- Taking on project and subproject management tasks within the Tyczka corporate group
- Software deployment (Ivanti DSM)
- Virtualization (VMware vSphere, DataCore)
- Microsoft Active Directory
- Microsoft Exchange Server, email archiving
- Microsoft SQL Server
- IT security (encryption, endpoint security, conducting regular security reviews)
IT System Administrator
Tyczka GmbH
Skills
Consulting Focus: It Management, It Strategy; Project Management; It Infrastructure, It Architecture; Cloud Infrastructure & Architecture; Virtual Infrastructures, Modern Workplace; Cyber Security, Cyber Recovery; Siem/soar/soc; Bcm, Backup, Disaster Recovery; Automation, Ai Integrations
Compliance & It Governance: Iso27001; Tisax; Gdpr; Bsi Basic Protection; Nis; Cis; Owasp; Itil V4
Microsoft: Microsoft Azure; Microsoft Azure Virtual Desktop; Microsoft Entra Id (Azure Ad); Microsoft Sentinel; Microsoft Defender For Endpoint; Microsoft Defender For Cloud; Microsoft Compliance (Purview, Dlm); Microsoft Intune (Endpoint Manager); Microsoft Ecm (Sccm); Microsoft Exchange Online; Microsoft Exchange On-premises; Microsoft Active Directory; Microsoft Sql Server; Microsoft Group Policies; Microsoft Teams; Microsoft Sharepoint; Microsoft Onedrive; Microsoft Server 2008 - 2025; Microsoft Hyper-v
Vmware: Vmware Esxi 5.5 – 8; Vmware Vcenter; Omnissa Horizon
Veeam: Veeam Backup & Replication; Veeam Backup For Azure; Veeam Backup For M365
Storage Systems: Datacore; Netapp; Dell Emc; Pure Storage
Firewalls & Networking: Hp Aruba; Opnsense; Fortinet; Cisco
Linux & Open Source: Mysql; Postgre Sql; Xen Server; Xcp-ng; Proxmox; Ubuntu; Debian; Kubernetes; Docker
Scripting & Automation: Powershell; Ansible; Terraform; Bash
Miscellaneous: Kanban; Scrum, Agile Project Management; Jira; Confluence; Servicenow
Languages
Education
IT Management Assistant
State-certified commercial assistant, specializing in Information Technology · Commercial Assistant
Certifications & licenses
Certified Ethical Hacker (CEH V9)
DataCore Certified Implementation Engineer (DCIE V10)
Designing & Implementing Microsoft Exchange Server
Frontrange Infrastructure Certified Professional
Microsoft Certified Professional
VMWare Certified Professional (VCP-DCV)
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