As an international waste management expert, he has been involved with waste management and on-site sanitation for over four decades in different parts of the world, working with international organisations like WHO, ADB, IGES (Japan), Rotary international, Government of India, PSU, Private Sector, NGO Sector and had opportunity of working with GIZ and ICLEI during preparation of the Municipal Solid Waste Management Manual and Guidelines on Usage of RDF.