Roel Hartman is a very experienced Oracle software architect. He started about 20 years ago using Oracle RDBMS 5, Oracle Forms 2.3, RPT/RPF, and Oracle*Case 4.5. Since a few years ago, he focuses mainly on Oracle Application Express.
Roel has been a speaker at UKOUG, OOW, Collaborate, Kscope, and a number of local Oracle user groups. He is an active participant in the Oracle APEX Forum and keeps an (APEX-related) blog at roelhartman.blogspot.com. In June 2009, Roel received an Oracle ACE award, and in August 2010 he was appointed as Oracle ACE Director. Roel is a co-writer of Expert Oracle Application Express and the main author of Oracle Application Express for Mobile Web Applications. He is director at APEX Consulting in the Netherlands and a member of the SMART4apex guild.