Sebastian Ziesing

Experience

• 

  Bausparkasse Schwäbisch Hall

  Oct 2012 - Sept 2015

  Dualer Student

  Environment Management Data Warehouse (2015/01 - 2015/09)• Project "Optimization of Enterprise Control Systems/Strategic Data Management"Release management (2014/06 - 2015/01), change management according to ITIL v3 (2013/08 - 2015/01)• Change manager according to ITIL v3, coordination of production patches and changes to standard software• Software qualitygate for in-house software, especially based on z/OS, using ISPF and IBM Rational• Job scheduling with CA Automic Workload Automation, primarily job creation and production handover• Business process modeling according to BPMN and eEPK Show less

• 

  Schwäbisch Hall Kreditservice AG

  Oct 2015 - Jul 2019

  • Test data and environment provisioning for business test and development environments on AIX/Linux-Oracle back-end• Job scheduling for process flow simulation• Execution of loading processes• Development and optimization of test data anonymization and extraction processes• Configuration management for DWH projects• Release planning, coordination of content with business units and producers• Evaluation and coordination of organizational and technical dependencies• Quality assurance and documentation Show less

  • Senior Data Warehouse Engineer

    Oct 2017 - Jul 2019

  • Data Warehouse Engineer

    Oct 2015 - Sept 2017
• 

  PwC Deutschland

  Jul 2019 - now

  • Team Lead: Tax Data & AI • Product Owner Special Fund Reporting• PySpark, SparkSQL, T-SQL Lead Development• Building Data & Delta Lake environments, application of Apache Spark• Software architecture with focus on cloud systems and migration• Data-driven Use Case & Prototype Development• IT compliance, manager risk compliance legal process

  • Manager, Tax & Legal Solutions - Digital | Authorized Signatory (Prokurist)

    Mar 2024 - now

  • Manager, Digital Products & Managed Services | Authorized Signatory (Prokurist)

    Oct 2022 - Mar 2024

  • Senior Associate

    Jul 2019 - Oct 2022