Rogier Noldus is expert at Ericsson Telecommunicatie B.V. in Rijen, The Netherlands. He has been involved in Intelligent Networks (IN) standardization and has driven the development of CAMEL within Ericsson. He has subsequently made a switch to IP multimedia system (IMS) and is now focusing on the integration of GSM and IMS networks, covering areas such as Next generation IN, Fixed mobile convergence, Media transmission, Multi access, Value added services (e.g. enterprise service such as IP Centrex) and Next generation networks.He holds a B.Sc. degree (electronics) from the Institute of Technology in Utrecht (The Netherlands) and a M.Sc. degree (telecommunications) from the University of The Witwatersrand (Johannesburg, South Africa). He joined Ericsson in 1996. Rogier's telecommunications roots lie in South Africa, where he worked for Siemens, Telkor and Telecommunications Manufacturers of South Africa (TMSA).Rogier is the author of the book "CAMEL, Intelligent Networks for the GSM, GPRS and UMTS network (Wiley, 2006) and is the author of various patents / patent applications in the area of Intelligent Networks, IMS and Fixed mobile convergence.Ulf Olsson is Senior Expert at Ericsson's Business Unit Multimedia, with a main interest in application architecture. He entered the world of programming forty years ago, working with large scale software system architectures for the past thirty. Initially, these efforts were in the field of distributed high performance systems for shipborne command and control, but as it turned out the principles and experiences from that field were surprisingly applicable also to the design of mobile packet data systems. He has been with Ericsson since 1996, being involved with systems like GPRS, PDC, UMTS, cdma2000 and - of course - IMS. His professional focus has recently shifted to the next level of abstraction: how to support and automate the business processes of a communications service provider.He holds a M.Sc. in engineering physics from Stockholm's Royal Institute of Technology, having also spent a scholarship year at Dartmouth College, New Hampshire. He is the co-holder of a number of patents in the mobile communications area, and is a frequent contributor to Ericsson Review.Dr Cathy Mulligan is a Visiting Researcher at Imperial College and was a founding Co-Director of the ICL Centre for Cryptocurrency Research and Engineering. She is also a Senior Research Associate at University College where she is Chief Technology Officer of the GovTech Lab and DataNet, which focuses on the potential and application of blockchain, AI and advanced communications technologies as a foundational part of the world's economy. Cathy is an expert and fellow of the World Economic Forum's Blockchain council and has recently become a member of the United Nations Secretary General's High Level Panel on Digital Co-Operation. She holds a PhD and MPhil from the University of Cambridge and is the author of several books on telecommunications including EPC and IoT.