A one-day seminar was organized by the Ministry of Environment (MoE), Sri Lanka in collaboration with IGES Centre Collaborating with UNEP on Environmental Technologies (CCET), United Nations Environmental Program, and Ministry of Environment, Japan (MOEJ) on 24th March 2021 with an objective to introduce the guideline report "Guidelines for Safe Closure and Rehabilitation of Municipal Solid Waste in Sir Lanka" and also to educate target users (persons who are responsible for decision making, operation, and management of final disposal sites) on the need, practice, and technical aspects of dumpsite safe closure and rehabilitation. The seminar invited key actors from relevant institutions and representatives from all nine provinces of Sri Lanka. The majority of participants were administrators, engineers, technical officers, public health inspectors, and environmental officers from Provincial/Local Authorities. In addition, participants from key stakeholder institutions such as the Ministry of Environment, National Solid Waste Support Center, and Waste Management Authority - Western Province also attended the seminar.