Karsten R.
Support Specialist
Experience
Jan 2023 - Present
2 years 11 monthsSupport Specialist
Bertelsmann SE & Co. KGaA
- Customer support for in-house developments MBSE and B2B
- Operating applications in-house, in Azure and on customer infrastructure
- Containerization and deployment automation with Ansible
Jan 2022 - Dec 2023
2 yearsOperations Engineer
Mercedes-Benz Tech Innovation GmbH
- Support for the PaaS Cloud Foundry
- Migration of infrastructure to AWS
- Automation with Ansible
Jan 2021 - Dec 2022
2 yearsDevOps
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 2019 - Dec 2020
2 yearsSystem Administrator
Comdirect Bank AG
- Data center operations
- Linux administration, L3 support
- Automation with Ansible, refactoring of existing scripts (Bash, Python)
- Migration of business applications during OS upgrade from RHEL 6 to 7
- Operation and improvement of patch management
Jan 2019 - Dec 2019
1 yearSystem Administrator
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 yearsSoftware Development
Itelligence / SAP SE
- Automation of server and environment setup in the SaaS cloud
- Linux administration, L3 support
- Setup of the converged cloud and server management
- L3 support in HEC (Hana Enterprise Cloud)
- Refactoring of monitoring
Jan 2016 - Dec 2016
1 yearSoftware Development
AMTC Dresden
- Extension of a Perl library
- Adapting existing data to changing machine formats
- Machine automation with Perl and Java
Jan 2015 - Dec 2015
1 yearAdministration of Linux Systems and Customer Applications
eWerk IT GmbH
- Administration, deployment and monitoring in a Unix/Linux environment
- Support for customers with technical issues and inquiries
- Documentation of IT support processes, customer requests and incident reports
- On-site project work for clients and technical consulting
- Continuous optimization of the Linux server landscape
- Installation, configuration and administration of high-availability server systems
- Automation of administration and workflows through scripting
Jan 2014 - Dec 2014
1 yearEmbedded Systems Programming
DORMA GmbH
- Feasibility study on the use of embedded systems
- Programming software for signal processing of optical scanners
- Design and planning of the central database
- Network design (subnet routing, packet filtering)
- Development of admin scripts for monitoring and controlling equipment
Jan 2010 - Present
15 years 11 monthsCluster Administration
GDF SUEZ EP
- Administration of a Megware supercomputer for seismic calculations
- Configuration and optimization of cluster software
- Installation and management of Linux clients
- Support for client software in the processing area
- Liaison between the specialist department and IT, advising both teams
- Development and enhancement of tools and scripts in the specialist department
- Setup of the trouble ticket system (data migration, plugin development, server administration)
Jan 2008 - Dec 2010
3 yearsClient Application Installation
IBM Business Service GmbH
- Setting up the system landscape for Gematik GmbH (health card)
- Supporting functional tests and deployment
- Developing Shell scripts for automated installation, monitoring, and administration
Jan 2007 - Dec 2008
2 yearsData Center Relocation, Application Installation, 3rd Level Support
IBM Business Service GmbH
- Installing and configuring client applications
- Configuring operating systems and system-level services
- Automating installation with Shell and Perl scripts
- Troubleshooting and System Analysis
- Performance Measurements
- 3rd Level Support
- Documenting servers and handing them over to operations
- Change Management
Jan 2006 - Dec 2007
2 yearsSoftware Development, 3rd Level Support
O3SIS IT AG
- 3rd Level Support and System Analysis
- Developing tools and contributing to software projects
- Creating reports and automating reports
Jan 2005 - Dec 2006
2 yearsAdministrator
Landratsamt Riesa
- Administering Linux and Windows Servers, expanding the IT infrastructure (setting up a subnet)
- Developing a mail server (Debian/Sendmail/Cyrus) and a firewall (Debian/Squid/IPTables)
Jan 2000 - Dec 2003
4 yearsUser Help Desk, 1st and 2nd Level Support
SEB-Invest
- Working in a User Help Desk, providing 1st and 2nd Level Support
- Installing clients, managing SQL/Oracle Servers and Application Servers
- Software Development, creating small applications and tools
- Supporting the Organizer product area
Jan 2000 - Dec 2000
1 yearUser Help Desk
Investitionsbank Berlin
- User help desk support: call intake, qualification and resolution of user issues by phone or remotely
- Administration of deployed Windows NT clients
- Coordination of office moves within the company
Jan 1999 - Dec 1999
1 yearRollOut
Bankgesellschaft Berlin
- Rollout of clients in the bank's office building and production deployment of the IT infrastructure
- Client configurations
Languages
German
AdvancedEducation
Wilhelm Büchner University
Bachelor of Science · Computer Science · Darmstadt, Germany
Dresden University
Civil Engineering · Dresden, Germany
Stahlwerk Riesa
Training as an Industrial Electronics Technician · Industrial Electronics · Riesa, Germany
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