Joel is the Senior Director of Software Development at Oracle America, Inc., managing the development and product management of Application Express (APEX). He started working with Oracle Database in 1992 and joined Oracle in 1996. Joel's passion is to make customers extraordinarily successful with the Oracle Database, SQL and Oracle Application Express (APEX). He is a proud alumnus of The Ohio State University, College of Engineering, with a Bachelor's degree in Computer Engineering.

Dan Geringer is Spatial Solutions Specialist at Oracle, working with Oracle's largest global customers and partners to solve challenging spatial requirements in a scalable manner. Dan started working with Oracle’s spatial database technologies in 1994, and joined Oracle in 1995 as a key member of Oracle’s spatial development team. Dan's innovative solutions center on the blending of Oracle's spatial data processing with Database features for scalability, performance, security, and availability. He presents regularly at Analytics and Data Summit and Oracle OpenWorld conferences. Dan is based near Reston, VA

Carsten Czarski is a member of the Oracle APEX development team, focusing on REST-related features, data loading and the Calendar component. He's also a pro on Oracle Spatial, Oracle Text, and JSON and XML functionality in the database.