- Board of management, National Science Foundation (2019 to date)
- External Member of the Faculty Board of Agriculture In the Faculty of Agricultural Sciences, Sabaragamuwa University of Sri Lanka (2008 – 2010)
- Board of Study in Environmental Sciences of the Postgraduate Institute of Science, university of Peradeniya (2008)
- Board of Study in Plant Sciences of the Postgraduate Institute of Science, University of Peradeniya (2000)
- Asian Elephant Specialist Group. Species Survival Commission, IUCN (2002- to date)
- Marine Environmental Council: Marine Environment Protection Authority (2017 to date)
- Sri Lanka Marine Environment Forum: Marine Environment Protection Authority (2017 to date)
- Environment and Biodiversity Working Group, National Science Foundation (2017 to date)
- Pollinator Conservation Advisory Group, Ministry of Environment and Mahaweli Development (2016 to date)
- National Expert Committee on Biological Diversity, Ministry of Environment and Mahaweli Development (2016 to date)
- National Invasive Species Specialist Group, Ministry of Environment and Mahaweli Development (2015 to date)
- Research Panel on Natural Resources and Biodiversity, National Science Foundation (2011 to 2016)
- National Forestry Sector Research Committee. Forest Department (2009 to date)
- National Species Conservation Advisory Group. Ministry of Environment and Mahaweli Development (2000 to date)
- National committee to revise the Biodiversity Conservation Action Plan of Sri Lanka. Ministry of Environment and Natural Resources (2004)
- National Committee on development of Environmental Indicators for Sri Lanka. Ministry of Forestry and Environment (2002 to 2003)
- Working committee on Biological Sciences. National Science Foundation (1999 to 2002)
