Gerd Kaluzinski is a Certified IT Specialist who works with Informix since 1992. He works as consultant at customer sites in IBM Softwaregroup Services and as trainer for IBM education. His specialties are Informix replication (HDR/RSS/ER/GRID), Datablades (for example, TimeSeries, Excalibur) and Stored Procedures. He is the editor of the monthly "German IBM Informix Newsletter."
Markus Holzbauer is advisory IT specialist and lead system engineer for Informix at GTS Service Delivery/Server Systems Operations, Germany. He has worked with Informix since Version 4 as consultant, supporter, DBA, systems administrator, and other roles. Time permitting, he writes SQL scripts published for the Informix administrators blog (https://www.ibm.com/developerworks/mydeveloperworks/blogs/informix_admins_blog/?lang=en_us).