John Weisend is currently a Senior Scientist and Group Leader for Specialised Technical Services at The European Spallation Source. He received his Ph.D. in Nuclear Engineering & Engineering Physics from the University of Wisconsin - Madison, where he investigated engineering applications of He II. He has worked at the SSC Laboratory, the Centre D'Etudes Nucleaires Grenoble, the Deutsches Elecktronen-Synchrotron Laboratory (DESY), the Stanford Linear Accelerator Laboratory (SLAC), the National Science Foundation and Michigan State University Dr. Weisend's research interests include He II and large scale accelerator cryogenics. He is the Chairman of the Board of Directors of the Cryogenic Society of America (CSA). He has led the CSA Short Course Program since 2001. He is Chief Technical Editor of Advances in Cryogenic Engineering. In addition to co-authoring more than 60 technical papers, Dr. Weisend is the co-author (with N. Filina) of Cryogenic Two-Phase Flow and the editor of the Handbook of Cryogenic Engineering, Editor of Cryostat Design (Springer, 2016) and Cryogenic Safety (Springer, 2018).