Joze Senegacnik has more than twentyseven years experience in working with Oracle products. In 1988, he started working with Oracle version 4. Since 1992, he has been self-employed as a private researcher in the field of computer science. Most of his work time is dedicated to solving performance bottlenecks in different application solutions that based on the Oracle database. He is also an international speaker giving talks on the most important Oracle database related events worldwide. He conducts well-known performance tuning courses together with Oracle University. Joze is traditional speaker at HrOUG, always with actual topics.