Freelancer

• Design and implementation of infrastructure concepts for virtualized servers with VMware vSphere and VMware vCenter
• Migration of vCenter 7 environments to vCenter 8
• Automated deployment of virtual machines with Microsoft PowerShell and VMware PowerCLI as well as Ansible Tower
• Prototyping and test migration of applications in various container environments
• Administration of firewalls and network components (routing and switching)
• Migration of the VPN connection for all employees from Sophos UTM to FortiGate IPSec VPN with FortiToken
• Automating OS installations on Linux with Ansible and GitLab

Used products:

• VMware vSphere 8 with VMware vCenter 8
• VMware API
• VMware NSX-T
• VMware vSAN
• VMware Tanzu
• Red Hat OpenShift
• Docker
• SLES15, Red Hat 9 and Microsoft Windows Server
• Microsoft Windows PowerShell
• GitLab
• Ansible Tower (AWX)
• SUSE Manager versions 4 and 5
• FortiGate Firewalls
• FortiNet Analyzer and Manager
• Juniper and Cisco switches and routers

• Planning, execution and support of the migration from Spacewalk to Foreman with Katello

Used products:

• Spacewalk
• Foreman with Katello (upstream of Red Hat Satellite)
• Microsoft Active Directory

• Planning and execution of the migration of virtualized servers with VMware vSphere and VMware vCenter from version 6.0 to 6.7
• Architecture of the new platform design under vCenter 6.7
• Scripting for Icinga to monitor vCenter

Used products:

• VMware vSphere 6.0 and 6.7 with VMware vCenter 6.0 and 6.7
• VMware Operations Manager
• VMware PowerCLI
• Microsoft Windows Server 2012 and SQL Server 2014
• Microsoft Windows PowerShell
• Red Hat Enterprise Linux 6 and 7
• Icinga Monitoring

• Design and setup of infrastructure concepts for virtualized servers with VMware vSphere and VMware vCenter 6.5
• Automated deployment of virtual machines using Microsoft PowerShell and VMware PowerCLI

Used products:

• VMware vSphere 6.5 with VMware vCenter 6.5
• VMware API
• LENOVO xSeries (x3550, x3650)
• SLES12 SP1 and Microsoft Windows Server 2014
• Microsoft Windows PowerShell
• GIT

• Infrastructure design in the area of cloud and hosting
• Architecture of custom customer solutions

Used products:

• VMware vSphere 5.5 with VMware vCenter 5.5
• VMware vRealize Automation Center (vCAC)
• EMC VMAX

• Engineering and architecture of the global virtualization platform
• Migration of virtualized servers with VMware vSphere and VMware vCenter from version 4.1 to 5.1
• Automated update and change procedures using Microsoft PowerShell and VMware PowerCLI
• Coordination of changes in a global IT structure

Products used:

• VMware vSphere 5.1 with VMware vCenter 5.1
• VMware PowerCLI
• Microsoft Windows Server 2008 and SQL Server 2012
• Microsoft PowerShell
• Subversion as version control system
• HP blade servers and EMC storage systems

• IT architecture and subproject leadership for LDAP consolidation
• Creation of authorization concepts

Products used:

• Solaris 8/9/10, Linux, Windows Server 2008
• BASH, Perl
• IBM ClearCase
• Eclipse
• Summit

• Administration of LAN/WAN based on Cisco routers and HP switches with OSPF and port security
• Administration of Linux servers (SLES 11) to provide network services on DELL hardware
• Hardening servers against external attacks from the internet
• Administration of DNS/DHCP/LDAP/RADIUS services
• 1st and 2nd level support

Products used:

• Cisco routers
• SLES 11, openSUSE and Knoppix
• VMware

• Design, setup and integration of new infrastructure concepts for customers (network, SAN, storage, servers)
• Configuration of network components (Cisco, Nortel, Juniper)
• Management of firewalls (Astaro and Lucent Brick)
• Administration of virtual machines with VMware vSphere and XEN
• Automatic installation of Linux servers using CMS and xCAT
• Data backups with IBM Tivoli Storage Manager
• Administration of Apache, MyDNS, MySQL on Linux (SLES)
• User support

Used products:

• Astaro Security Gateway 320
• IBM TSM Server 5.5
• IBM xSeries (x3550, x3650)
• IBM Storage (DS4700, DS4300)
• IBM BladeCenter (BC-E, BC-H, HS20-22, JS20)
• IBM AIX 5.3-6.1

Topic of the diploma thesis: 'Benefits and uses of storage management functions in managing media essences'

• Extensions to the IBM ADMIRA solution for LAN-free data transfer
• Development in C and Java
• Deployment on Linux and AIX with IBM GPFS and TSM

• Built a European recycling portal
• Developed a web application in WebObjects 5.3