Johnny Stuen worked at the Waste Agency , City of Oslo, from 2007 until February 29022. He was responsible for operation, technology strategy and development of the treatment plants for municipal waste in the City of Oslo. Oslo has optical sorting facilities, one biological treatment/ biogas production and two waste to energy plants. He holds a Masters degree in process technology, and has worked in several industrial companies producing chemicals, insulation and foodstuff before he joined the Waste Agency in 2007. He has lead the national working group on energy recovery in Norway (Afvall Norge), and since 2010 has been a member the ISWA (International Solid Waste Association) working group for energy recovery, and since spring 2017 he has chaired the same group.