Roel is a experienced Oracle Software Architect. He started a long time ago using Oracle RDBMS 5, Oracle Forms 2.3, RPT/RPF and Oracle*Case 4.5. Since a few years he focuses mainly on Oracle Application Express.Roel has been a speaker on UKOUG, OOW, Collaborate, ODTUG's KSCOPE and a number of local Oracle User Groups. He acts as the APEX Content Lead for the Kscope14 and KScope15 conferences and keeps an (APEX-related) blog on http://roelhartman.blogspot.com. In June 2009 Roel received an Oracle ACE award and in August 2010 he's appointed as Oracle ACE Director. Roel is a co-writer of the "Expert Oracle Application Express" and "Oracle Application Express for Mobile Web Applications" books.Roel is Director at APEX Consulting in The Netherlands.