Stefan Oehrli is a platform architect, trainer and partner at Trivadis AG. After studying electrical engineering and several years of experience as a project engineer in microelectronics and computer science, he began working on database systems at the end of 1998. During this time he was able to gain sound experience in the development and operation of Oracle databases, the creation and implementation of backup & recovery and security concepts. His main interests are physical database design, backup & recovery, container technologies, database security, enterprise user security, database internals and everything else related to the central Oracle database technology. In addition to the Trivadis courses and seminars, he regularly lectures at conferences and user group meetings as Oracle ACE. He is co-author of the book "The Oracle DBA" (Hanser, 2016).