Self-employed / Freelancer

General freelance activities:

• Cisco IronPort / File Server Datacenter Move.
• DHCP / DNS upgrade from 2008R2 to 2019 and datacenter move.
• RDS/RDSH server environment, Active Directory, GPO.
• VMWare 6.5/6.7 enterprise cluster environment.
• OpCon-Veritas-Veeam backup systems.
• Development of PowerShell / PowerCLI scripts to automate recurring administrative processes and rollouts as well as automatic creation of regular reports.
• Bitlocker project.
• Adjustment of GPOs.
• FTP Enterprise, WSUS.
• Server migration from 2008R2 to 2012/2016.
• Customization of monitoring systems "Icinga".

Projects and engagements:

• Project: Domain functional level upgrade of the production environment in Aachen (05.07.2021 – 30.06.2023). Location: Aachen, Germany.
• DFL / FFL 2008R2 to 2016, ESX, Proxmox: setup of the environment of VMWare HA cluster versions such as vSphere 6 / 6.5 / 6.7 / 7 / 7.5 on Intel Xeon x86 processors on server hardware (DELL / HPE / Fujitsu) as well as the respective storages Nimble / Synology / Qnap / SAN.
• Veeam backup concepts and administration of large VMware virtualization environments.
• Zabbix, DNS / DHCP scopes, domain controller schema adjustments to LDAP structures in AD.
• Handling of ticketing systems.
• Server provisioning (IIS/Altrium/Winline etc.).
• Microsoft server installations and updates.
• Storage maintenance (Synology/Nimble).
• Project: server configuration and migration of all servers to the cloud / data center Cuxhaven, Bremerhaven (03.12.2020 – 05.02.2021). Location: Cuxhaven, Bremerhaven, Germany.
• Project: migration / rebuild of infrastructure in Frankfurt am Main data center (01.10.2020 – 31.10.2020). Location: Frankfurt am Main, Germany.
• Project: complete server / client structure setup for G-LOG (28.02.2020 – 12.05.2020).
• Engagement as administrator at ITZBund (15.06.2019 – 28.02.2020).
• Engagement at Friatec / Aliaxis (role: server / VMware / projects / script developing) (14.01.2019 – 15.06.2019).
• Engagement as server administrator at Heinzel (01.08.2018 – 14.01.2019).

• Administration Windows 8.1 Office 2013 user support.
• Server administration Citrix Microsoft 2008/2012 in all branches.

• Planning and implementation of Windows 2000 / 2003 / 2008R2 servers.
• Windows NT 4.0 migration to Windows 2000/2003/2008.
• Troubleshooting in Active Directory.
• Analysis and troubleshooting of hardware and software problems.
• Replacement of computers, cards (network, graphics, memory, motherboard, etc.), TFT monitors.
• Resolving dial-in issues with laptops (software, hardware, and user errors).
• Resolving network issues (problems accessing the network).
• Replacement of network components in the frontend area (hubs, switches, cables and fiber optics).
• Network management and administration.
• Data backup for users.
• Data recovery from defective hard drives.
• User support for hardware and software operation issues.
• Firewall installation and configuration.
• Configuration of MS SQL Server.
• Server installations and server administration.
• Troubleshooting R3 applications and various R3 transactions.
• Support for the customer's standard software.
• Support of the board area (executives, assistants and secretaries).
• Conference rooms and video conferences, as well as Cisco telepresence.
• Installations and troubleshooting of WinNT4.0/Win2000/WinXP/Vista Enterprise.
• 2nd level support of client environments, including applications (MS Office, Win98, 2000, XP, Server 2003, 2008/SAP R/3, antivirus/firewall/SafeBoot/databases/encryption software).
• PC, servers, networks, mobile phones, BlackBerry, UMTS cards for laptops, projectors, printing.
• Developer support (HANA project) at SAP Labs.

System support (2008):

• Support of the server environment in the Windows 2003/2008 environment in the administration / support area of a major customer.
• Administration of the server landscape.
• Hardware monitoring with Insight Manager 7.0.
• Support in the client environment Windows XP and Office 2003 / 2007 / 2010 Outlook.
• Administration of the server landscape under Windows 2003.
• Conceptual design of hardware monitoring with Insight Manager.
• Support of SharePoint Portal Server 2003.
• Data backup with Veritas Backup Exec v10.5.
• Implementation of new group policies worldwide.

Windows 7 migration project:

• Planning, preparation and implementation of an NT 4.0 migration to Windows 2003 Active Directory (AD).
• Migration of Exchange 5.5 server to Exchange 2003.
• Planning, integration and configuration during a Microsoft WSUS rollout.
• Planning and design of the migration approach.
• Designing the hardware for building the existing server landscape.
• Executing the migration of Windows NT 4.0 servers to Windows 2003 servers.
• Migration of Exchange 5.5 to Exchange 2003.
• Implementation of an antivirus solution.
• Implementation of remote access (VPN, UMTS).
• Installation and configuration of WSUS servers.
• Creation of WSUS groups and Group Policy Objects.
• Testing synchronization between downstream, upstream servers and client systems.
• Implementation of remote access for remote maintenance (Astaro dial-in router).

Windows 7 - migration project:

• Planning, preparation and execution of a Windows 2000 migration to Windows 2003 Active Directory (AD).
• Planning and design of the integration and migration approach.
• Installation and configuration of server systems.
• Executing the migration.
• Setting up data backup (NT Backup).
• Implementation of remote access for remote maintenance (Cisco dial-in router).

Relocation of the existing data center:

• Planning, preparation and execution for the consolidation of individual Windows 2000 server systems.
• Planning and design of the relocation approach.
• Installation of the network infrastructure and commissioning of network components.
• Planning and installation of Exchange 2003.
• Setting up data backup (Veritas Backup Exec v10.5).

• Network connections (client-server environment).
• PC/laptop support.

• Fixed-term contract.