Stephan Schulz received his Ph.D. in Electrical and Computer Engineering at the University of Arizona. He holds a BS EE degree from SUNY Binghamton and a MS in ECE from The University of Arizona and has working for the past three years at the Nokia Research Center in Helsinki on the development of TTCN-3 test systems for various IETF protocols. He has been involved in the implementation of the first public ETSI TTCN-3 test suite which was for SIP testing. Currently he is one of the main architects in the ETSI design team, which has developed a generic methodology for TTCN-3 test suite development as well as library based TTCN-3 code implementation in the context of an Ipv6 test system. He has been the main editor of the TTCN-3 Runtime Interface (TRI) standard, co-author of a book on TTCN-3, and made major contributions in the field of TTCN-3 based text-based protocol testing.