- administer company critical databases (10g, 11g, 12c, 19c RAC Oracle, Dataguard)- administer Oracle Multitenant databases on version 19c- install and tune 10g, 11g, 12c, 19c Single- und RAC databases with/without ASM- install, upgrade and administer Oracle Clusterware and Grid Infrastructure- backup/restore/recovery with RMAN- define and document internal database guidelines- plan and install new patches for RDBMS Systems- install SAP Bundle Patches on SAP databases- develop workarounds and tune servers as well as databases- SQL tuning- work in a 7x24x365 production environment with on-call duty- configure monitoring with Oracle Cloud Control- create production database copies for tests using RMAN and snap clone- migrate data into new databases (including O2O framework)- upgrade productive databases (using O2O framework, export/import, upgrade)- third level support for +4500 databases in Edeka markets on different Windows systems- database architecture lead- administer MS SQL Server databases (principal/mirror/witness)- administer SAP HANA databases- administer PostgreSQL databases

- administer company critical databases (9i, 10g, 11g, 12c, 19c RAC Oracle, Data Guard)- install, upgrade, and administer of Grid Infrastructure- install and tune 10g,11g, 12c, and 19c Single- und RAC databases with/without ASM- backup/recovery with RMAN- define and document internal database guidelines- plan and install new patches for RDBMS Systems- develop workarounds and tune servers as well as databases- work in a 7x24x365 production environment with on-call duty- configure monitoring with HP Open View- migrate databases to new platforms using O2O framework- migrate data into new databases- upgrade productive databases- lead in database architecture

- administer company critical databases (11g, 12c, RAC Oracle, Data Guard)- install, upgrade, and administer of Grid Infrastructure- install and tune 11g and 12c Single- und RAC databases with/without ASM- backup/recovery with RMAN, database refresh with RMAN- define and document internal database guidelines- plan and install new patches for RDBMS and SAP Systems- develop workarounds and tune servers as well as databases- work in a 7x24x365 production environment with on-call duty- configure monitoring with Check_MK- support SAP unicode migrations- migrate databases to new platforms using O2O framework- migrate data into new databases- upgrade productive databases- MS SQL Server 2005, 2008, 2012, 2014, 2017 with witness (standby) and witness- PostgreSQL database administration, concepts, upgrade

- administer company critical databases (9i, 10g, RAC Oracle)- install and tune 10g Single- und RAC databases with/without ASM- backup/recovery with RMAN- define and document internal database guidelines- plan and install new patches for RDBMS Systems- develop workarounds and tune servers as well as databases- work in a 7x24x365 production environment with on-call duty- configure monitoring with BMC Patrol- migrate data into new databases- upgrade productive databases- SQL-tuning of critical databases

- Responsible for concept and implementation of migration from contract centred view to customer centred view - Worked in project in regards to systems architecture and application interfaces- conception of the interface architecture and an Enterprise Application Integration platform- development of guidelines and necessary procedures in connection with data management- responsible for high quality and availability of data supply for mobilcom holding- continuous development of IT landscape- planning of conclusive and obliging data supply strategy - process owner of all data related to data and interface management- administered Oracle, Informix, and MS SQL Server databases of up to 2 TB- installed, tuned, and backuped/recovered databases with RMAN- configured different parameters and scripts for monitoring- planned and installed new RDBMS patches- served in a 7x24h production environment.

- Provided technical support for core processes (calls processing and billing) of a Java-based billing system- Analysed reported errors and developed workarounds- Executed and prepared tests in business critical core processes- Built and set-up of different databases for software development, quality assurance, and production- Executed and supported billing system installations at home and abroad- Carried out User Acceptance Tests at international customers sites- Consulted project managers and developers- Trained new colleagues

- Provided technical support for core processes (calls processing and billing) of a Java-based billing system- Analysed reported errors and developed workarounds- Executed and prepared tests in business critical core processes- Built and set-up of different databases for software development, quality assurance, and production- Executed and supported billing system installations at home and abroad- Carried out User Acceptance Tests at international customers sites- Consulted project managers and developers- Trained new colleagues

- Coordinated projects within the US MARGINS Program- Communicated with scientists and non-scientists- Wrote, edited, and distributed the MARGINS newsletter- Oversaw the day to day operation of the MARGINS office- Developed material for the MARGINS web site and database- Managed national meeting logistics and travel arrangements.