Karsten Rehberg

Support Staff

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Riesa, Germany

Experience

Jan 2023 - Present
3 years 1 month

Support Staff

Bertelsmann SE

Jan 2023 - Present
3 years 1 month

Support Staff

Bertelsmann SE & Co. KGaA

  • Customer support for in-house developments MBSE and B2B
  • Operating the applications in-house, in Azure, and on customer infrastructure
  • Containerization and automation of deployments with Ansible
Jan 2022 - Dec 2023
2 years

DevOps

Mercedes-Benz AG

Jan 2022 - Dec 2023
2 years

Operations Engineer

Mercedes-Benz Tech Innovation GmbH

  • Support for the Cloud Foundry PaaS
  • Migration of infrastructure to AWS
  • Automation with Ansible
Jan 2021 - Dec 2022
2 years

DevOps

Bertelsmann SE & Co. KGaA

  • Deployment and operation of in-house developments SXP, B2B
  • Application management and operation of third-party software
  • Automation and monitoring
  • Administration of Kafka, Redis
Jan 2020 - Dec 2022
3 years

DevOps

Bertelsmann SE & Co. KGaA

Jan 2019 - Dec 2020
2 years

System Administration

Comdirect Bank AG

  • Data center operations
  • Linux administration, L3 support
  • Automation with Ansible, refactoring existing scripts (Bash, Python)
  • Migration of business applications during OS upgrade from RHEL 6 to RHEL 7
  • Operation and improvement of patch management
Jan 2019 - Dec 2020
2 years

Red Hat Administration

comdirect Bank AG

Jan 2019 - Dec 2019
1 year

System Administration

Provinzial NordWest Holding AG

  • Migration from SLES to RHEL
  • Linux administration, day-to-day support
  • Automation with Jenkins
  • Automation and integration of Azure VMs
  • Migration of Tomcat VMs into Docker
Jan 2017 - Dec 2018
2 years

Software Development

Itelligence / SAP

Jan 2017 - Dec 2018
2 years

Software Developer

Itelligence / SAP SE

  • Automation of server and system landscape setup in the SaaS cloud
  • Linux administration, L3 support
  • Setup of the converged cloud and server management
  • L3 support in the HEC (HANA Enterprise Cloud)
  • Refactoring of monitoring
Jan 2016 - Dec 2017
2 years

Software Developer

AMTC Dresden

Jan 2016 - Dec 2016
1 year

Software Developer

AMTC Dresden

  • Extension of a Perl library
  • Adaptation of existing data to changing machine formats
  • Machine automation with Perl and Java
Jan 2015 - Dec 2016
2 years

Linux Administration

EWERK Leipzig

Jan 2015 - Dec 2015
1 year

Administration of Linux systems and customer applications

eWerk IT GmbH

  • Administration, deployment, and monitoring in a Unix/Linux environment
  • Assisting customers with technical issues and inquiries
  • Documentation of IT support processes, customer inquiries, and incident reports
  • Project work at customer sites and technical consulting
  • Continuous optimization of the Linux server landscape
  • Installation, configuration, and administration of high-availability server systems
  • Automation of administration and processes through scripting
Jan 2014 - Dec 2014
1 year

Embedded Systems Programming

DORMA GmbH

  • Feasibility study for using embedded systems
  • Programming software for optical scanner signal processing
  • Designing the central database
  • Planning the network (subnet routing, packet filtering)
  • Developing admin scripts for system monitoring and control
Jan 2010 - Present
16 years 1 month

Cluster Administration

GDF SUEZ EP

  • Administering a Megware supercomputer for seismic calculations
  • Configuring and optimizing cluster software
  • Installing and managing Linux clients
  • Supporting client software in the processing department
  • Acting as liaison between the business unit and IT, advising both teams
  • Developing and improving tools and scripts in the business unit
  • Setting up the trouble ticket system (data migration, plugin development, server administration)
Jan 2010 - Dec 2015
6 years

Linux Cluster Administration

GDF SUEZ EP

Jan 2008 - Dec 2010
3 years

Customer Application Installation

IBM Business Service GmbH

  • Setting up the system environment for Gematik GmbH (health card)
  • Supporting functional tests and commissioning
  • Developing shell scripts for automated installation, monitoring, and administration
Jan 2007 - Dec 2010
4 years

Unix Administrator

IBM Deutschland GmbH

Jan 2007 - Dec 2008
2 years

Data center migration, application installation, 3rd level support

IBM Business Service GmbH

  • Installation and configuration of customer applications
  • Configuration of operating systems and system services
  • Automating installation with shell and Perl scripts
  • Troubleshooting and system analysis
  • Performance measurements
  • 3rd level support
  • Documentation of servers and handover to operations
  • Change management
Jan 2006 - Dec 2007
2 years

Incident Manager

O3SIS IT AG

Jan 2006 - Dec 2007
2 years

Software development, 3rd level support

O3SIS IT AG

  • 3rd level support and system analysis
  • Development of tools and participation in software projects
  • Creating reports and automating them
Jan 2005 - Dec 2006
2 years

Administrator

Landratsamt Riesa

  • Administration of Linux and Windows servers, expanding the IT infrastructure (setting up a subnet)
  • Development of a mail server (Debian/Sendmail/Cyrus) and a firewall (Debian/Squid/IPTables)
Jan 2000 - Dec 2003
4 years

System administrator

SEB Invest

Jan 2000 - Dec 2003
4 years

User Help Desk, 1st and 2nd Level Support

SEB-Invest

  • Worked in a user help desk, providing 1st and 2nd level support
  • Installed clients, managed SQL/Oracle servers and application servers
  • Developed software, small applications and tools
  • Supported the Organizer product area
Jan 2000 - Dec 2000
1 year

User Help Desk

Investitionsbank Berlin

  • Worked as support staff in a user help desk, taking calls, diagnosing and resolving user issues by phone or remotely
  • Administered Windows NT clients
  • Coordinated office moves within the group
Jan 1999 - Dec 1999
1 year

RollOut

Bankgesellschaft Berlin

  • Rolled out clients in the bank's office building, bringing the IT infrastructure into production
  • Configured clients
Jan 1998 - Dec 2000
3 years

Network Technician

Freelance Work

Summary

  • Expert knowledge: Linux and Perl

  • Basic knowledge: Docker, databases (MySQL, PostgreSQL), software development (Python, Java), IT security

Languages

German
Advanced

Education

Wilhelm Büchner Hochschule

Bachelor of Science · Computer Science · Germany

Universität Dresden

Civil Engineering · Dresden, Germany

Stahlwerk Riesa

Industrial Electronics Technician · Riesa, Germany

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