Derk-Jan de Grood works for Valori as senior test manager and Agile Transition Coach. His drive is to improve the visibility of testing in both agile and traditional organizations, by sharing his knowledge and experience by means of training, presentations, workshops and publications. He is a regular speaker at conferences like EuroSTAR, wrote several successful books on software testing and publishes articles for the major testing magazines. In 2014 he won the EuroSTAR Testing Excellence Award.

Jan Jaap Cannegieter is a well-known consultant, author, (keynote) speaker and requirements and test specialist form the Netherlands. He has 20 years of experience in ICT and did assignment s in testing, quality assurance, TMMi, CMMI, SPI, Agile  and requirements. In testing he was a tester, test manager, test consultant and workshop leader. At this moment Jan Jaap is test/QA-manager and delivery manager at DinamiQs and vice president of SYSQA B.V., a company of 180 employees specialized in requirements, software testing, quality assurance and IT-governance. Within SYSQA Jan Jaap coaches other testers and test managers, is the thought leader and responsible for product development. He is the driving force behind Situational Testing and he wrote several articles and books in the Netherlands.