Marco Ritzkowski is a senior advisor at HiiCCE – Hamburg Institute for Innovation, Climate Protection and Circular Economy GmbH (Germany) since 2020 and assistant professor at both the Hamburg University of Technology (TUHH), Helmut Schmidt University and Peter the Great - St. Petersburg Polytechnic University (Russia). From 2005 until 2020 he was senior researcher at TUHH, Sustainable Resources and Waste Management. In 2005 he received his PhD from the same University. He participated in several national and international research-projects regarding the landfill-behaviour of municipal solid waste, waste pre-treatment and aftercare of MSW landfills and he was the responsible researcher for the scientific attendance of the German R&D-project 'Aerobic in-situ stabilisation of landfills'. Since 2009 he was managing international projects in connection with the impact of climate change on water quality as well as aftercare of solid waste landfills.

Marco Ritzkowski is Managing Director of the International Waste Working Group (IWWG) since 2011 and leader of the IWWG Task Group on Landfill Aeration since 2008. Since 2019 he is Associate Editor of the IWWG journal Detritus.