Herman is a Dutch aquatic ecologist with more than 18 years experience. He has worked for regional water authorities on river and lake restoration projects. In 2007 Herman started Wanningen Water Consult. He develops fish migration visions and policies and gives advice on implementing different types of fishway techniques. He gives advice on national and international fish passage and river connectivity projects such as the Iron Gate Dam in the Danube river (Romania) and a Sturgeon project in the Ebro river (Spain). He organizes conferences, network meetings and is the founder of the World Fish Migration Network and Fish Ecology Network on LINKEDin. Herman initiated and coordinated the European guidance on fish migration "From sea to source" (2006) which was also translated into Chinese in 2011. Herman is coordinator and co-author of the worldwide guidance “From sea to source, International guidance for the restoration of fish migration highways” which was published in 2012 (www.fromseatosource.com). In 2014 and 2016 he coordinated the World Fish Migration Day. This international event was celebrated on hundreds of locations worldwide, reaching millions of people. The next World Fish Migration Day is scheduled for April 21, 2018.