Sylwester Kaczmarek received his M.Sc in electronics engineering, Ph.D. and D.Sc. in switching and teletraffic science from the Gdansk University of Technology, Gdansk, Poland, in 1972, 1981 and 1994, respectively. His research interests include: IP QoS and GMPLS and SDN networks, switching, QoS routing, teletraffic, multimedia services and quality of services. Currently, his research is focused on developing and applicability of VoIP and IMS/NGN and SDN technology. So far he has published 2 monographs, more than 250 papers. Among his promoted students, there are 278 engineers and M.Scs., as well as 4 Ph.Ds. He is participating in the realization and directing projects and research-development grants.