Holger Friedrich serves as CTO of sumIT AG. sumIT is a Swiss-based consulting company, focused on data warehousing and Business Intelligence, employing Oracle technology. After obtaining a computer science diploma and a doctoral degree in robotics, machine learning, and data mining, Holger worked for several years in industrial research before co-founding sumIT AG. He has more than a decade of experience in Oracle DWH and BI projects and has used the database and Oracle's BI and DI products in numerous projects since 1997. Holger is a regular speaker at Oracle conferences such as OpenWorld and Kscope. He has long-term working relationships with Oracle development and product management in data integration and data warehousing, and is an Oracle ACE for BI and DWH.