Romas Mažeika finished his PhD studies in Nature Sciences, Chemistry, Faculty of Chemical Technology from Kaunas University of Technology in 1992. From 1984 to 1993, he was a researcher of Chemical Technology at Kaunas University of Technology. From 1993 to 1996, he was the head of the Technical Department at SC “Inkaras”. From 1996 to 2011, he was the head of the scientific research laboratory at SC “Achema”. Since 2010, he has been the head of the Analytical Department in the Agrochemical Research Laboratory, Institute of Agriculture, LAMMC. In the Agrochemical Research Laboratory, Institute of Agriculture, LAMMC, he was a senior researcher from 2012 to 2019 and became a chief researcher in 2019. Now he is a Guest Editor of the Special Issue "Sustainable Horticultural Waste Management" in MDPI. His research interests mainly include agrochemistry, waste utilization, and cycle economy.