Kee's d'Angremond graduated at Delft University of Technology in 1963 in civil engineering. He started working at WLIDelft Hydraulics, where he worked mainly in the field of maritime structures and dredging research. In 1975, he joined Volker Stevin Dredging and was involved in design and construction of a large number of projects in the Netherlands and abroad. From 1987 until 1989 he was managing director of the Port of Amsterdam. In 1989 he was appointed as full professor in Coastal Engineering at Delft University of Technology. Ferd C. van Roode graduated at Delft University of Technology in 1965 in civil engineering. He then joined WLIDelft Hydraulics. From 1970 until his retirement in 1999 he was employed by Royal Boskalis Westminster. As senior engineer in the research department he was (amongst others) involved in preparation and execution of several tidal closures. From 1986 until 2000 he was associate professor at Delft University of Technology on a part time basis.