Karsten R. - Support Specialist

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Riesa, Germany

Experience

Jan 2023 - Present

2 years 10 months

Support Specialist

Bertelsmann SE & Co. KGaA

Customer support for in-house developments MBSE and B2B
Operation of applications in-house, in Azure, and on customer infrastructure
Containerization and automation of deployments with Ansible

Jan 2022 - Dec 2023

2 years

Operations Engineer

Mercedes-Benz Tech Innovation GmbH

Supporting 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 and B2B
Application management and operation of third-party software
Automation and monitoring
Administration of Kafka and Redis

Jan 2019 - Dec 2020

2 years

System 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 year

System 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 to Docker

Jan 2017 - Dec 2018

2 years

Software development

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 2016

1 year

Software development

AMTC Dresden

Extension of a Perl library
Adapting existing data to changing machine formats
Machine automation using Perl and Java

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
Supporting customers with technical issues and inquiries
Documentation of IT support processes, customer inquiries, and incident reports
On-site project work for customers and technical consulting
Continuous optimization of the Linux server landscape
Installation, configuration, and administration of high-availability server systems
Automating administration and processes through scripting

Jan 2014 - Dec 2014

1 year

Programming of embedded systems

DORMA GmbH

Feasibility study for the use of embedded systems
Programming software for signal processing of optical scanners
Drafting and design of the central database
Designing the network (subnet routing, packet filtering)
Development of admin scripts for monitoring and controlling the systems

Jan 2010 - Present

15 years 10 months

Cluster administration

GDF SUEZ EP

Administration of a Megware supercomputer for seismic calculations
Configuration and optimization of the cluster software
Installation and management of Linux clients
Support for the client software in the processing area
Acting as the interface between the specialist department and IT, advising both departments
Development and further development of tools and scripts in the specialist department
Setting up the trouble ticket system (data migration, plugin development, server administration)

Jan 2008 - Dec 2010

3 years

Installation of Customer Applications

IBM Business Service GmbH

Set up the system landscape for Gematik GmbH (health card)
Supported functional tests and commissioning
Developed shell scripts for automated installation, monitoring, and administration

Jan 2007 - Dec 2008

2 years

Data Center Move, Application Installation, 3rd Level Support

IBM Business Service GmbH

Installed and configured customer applications
Configured operating systems and system services
Automated installation using shell and Perl scripts
Troubleshot and analyzed systems
Performed performance measurements
3rd Level Support
Documented servers and handed them over to operations
Change Management

Jan 2006 - Dec 2007

2 years

Software Development, 3rd Level Support

O3SIS IT AG

3rd Level Support and system analysis
Developed tools and participated in software projects
Created reports and automated reporting

Jan 2005 - Dec 2006

2 years

Administrator

Landratsamt Riesa

Administered Linux and Windows servers, expanded IT infrastructure (set up a subnet)
Developed a mail server (Debian/Sendmail/Cyrus) and a firewall (Debian/Squid/IPTables)

Jan 2000 - Dec 2003

4 years

User Help Desk, 1st and 2nd Level Support

SEB-Invest

Worked in a user help desk, 1st and 2nd Level Support
Installed clients, managed SQL/Oracle servers and application servers
Software development, created small applications and tools
Supported the Organizer product area

Jan 2000 - Dec 2000

1 year

User Help Desk

Investitionsbank Berlin

Support staff member in a user help desk, answering calls, qualifying and resolving user issues by phone or remotely
Administration of deployed Windows NT clients
Coordination of relocations within the group

Jan 1999 - Dec 1999

1 year