Member          Editorial Board, "The Open Transportation Journal" published by Bentham Science Publishers

Editor              Special Issue on "Environmental Implications of Urban Transportation in Asia", International J. of Environment and Pollution, Inderscience Publishers, Switzerland (2007)

Editor              Special Issue on "Issues in Urban Environmental Management", International J. of Environment and Pollution, Inderscience Publishers, Switzerland, (2003)

Editor             Annual Report 1998-99, Indira Gandhi Institute of Development Research, Mumbai, India

Peer Reviewer for the following international journals-

• Energy Policy, An International Journal from Elsevier
• Journal of Air and Waste Management Association, USA;
• International Journal of Environment and Pollution, Inderscience Publishers;
• Journal of Environmental Management, Elsevier;
• International Review of Environmental Strategies, International Journal published by IGES, Japan;
• Transportation Research, Part A - Policy and Practice, Elsevier;
• International journal "Ecological Economics", Elsevier;
• Journal World Review of Entrepreneurship, Management and Sustainable Development, Inderscience publisher;
• International Journal "Cities", Elsevier;
• International Journal of Global Environmental Issues, Inderscience Publishers;
• IIMB Management Review, Indian Institute of Management, Bangalore, India;
• Computer, Environment and Urban Systems (CEUS - Elsevier);
• International Journal of Sustainable Transportation; Energy Policy (Elsevier)
• Omega, The International Journal of Management Science, Elsevier
• International Journal of Environment and Waste Management (IJEWM), Inderscience Publishers
• The Open Transportation Journal, Bentham Science Publishers
• Journal of Material Cycle and Waste Management, An International Journal published by the Japan Society of Waste Management Experts
• Journal of Industrial Ecology, An International Journal Published by MIT Press, USA
• Environment, Development and Sustainability, An international journal from Springer Publishers
• Journal of Public Health and Epidemiology (Academic Press)
• Journal of Social Science and Environmental Management (Academic Press)

• Open NIES Talk on "Urban Energy and Carbon Intensity in India and Its Determinants - A Household Level Analysis", at the National Institute for Environmental Studies (NIES), Tsukuba, Japan, 29th November 2010.

• Invited Expert, the 7th NIES Workshop on E-waste held at the National Institute for Environmental Studies (NIES), Tsukuba, Japan during 18-20th October 2010 and made an expert presentation on E-Waste Management in India - Issues, Challenges and Policy Response(18th October 2010)

• Invited expert at the Regional Workshop on "Waste Management in the Sohar Industrial Port", organized by Sohar Environmental Unit, Ministry of Environment and Climate Affairs, Sultanate of Oman, Crown Plaza Sohar, 20th September 2010 and spoke on "Design Aspects of Landfill-Environmental considerations"

• Coordinator for a "Panel on Harmonized Emission Standards in India - What can be learned from Europe Experience", Diesel Emission Conference (DEC-2010), Organized by Integer Research, London (8-9 September 2010), Leela Kempsi, Gurgaon, New Delhi, India 

• Invited Expert Speaker for the session on "Finance for Agriculture and Forestry - CDM Project" at the Continuing Professional Development Programme on Clean Development Mechanism (CDM) and Carbon Finance for Agriculture and Forestry and Land use Project, organized by the Engineering Staff College of India (ESCI), 25-27th August 2010, ESCI, Hyderabad, India

• Attended the 23rd Research and Development Advisory Committee (RDAC) meeting of the Ministry of Rural Development and made a presentation (of the proposed project) on Development of Low Cost Filter for the Removal of Pesticides in the Rural and Perticide Effected Area", 16th" June 2010, MoRD, Paryavaran Bhawan, Delhi

• Invited Guest (on President's Invitation) Lecture" (Environmental Protection - Changing Trends and the Present Day Needs) at GITAM University, Visakhapatnam, India, on 15th July 2009.

• Chairman, Session on "Green Building, Energy Saving and Carbon Markets", International Conference on Green Growth, Organized by ICFAI Business School and Andhra Pradesh Forest Academy, 17-18 December 2008, Hyderabad, India

• Panel Member, Panel discussion on "India's Environmental Challenges", held at IBS, Hyderabad on 18th December 2008, Jointly organized by ICFAI Business School and Andhra Pradesh Forest Academy

• Invited Special Lecture on "Economics of Waste Management" at Chongwon National University, Chongwon, South Korea, 31st March 2008

• Invited Guest Speaker, at KAIST Golden Triangle Research Collaboration meeting and gave a lecture on "Environmental Engineers and Sustainable Development", Ulsan, South Korea, 22nd February 2008.

• Gave an invited lecture on "Response Strategies for Climate Change Mitigation - A Developing Country Perspective" as a part of the Environmental Technology Seminar series under the prestigious BRAIN KOREA 21 programme of Korean Government (at the University of Ulsan, South Korea, 7th December 2007) 

• Chairman, Session on Urbanization, Migration and Health, Students Colloquium on Development Research (SCODER), IGIDR, 28-29th September 2007.

• External examiner for student presentations at Center for Environmental Science and Engineering, Indian Institute of Technology (IIT), Bombay, India (2006). 

• Invited expert, Joint Seminar on Climate Change: The Urban Transportation Challenge, Organized by the Municipal Corporation of Kolkata and the Centre for Social Markets (CSM), Wednesday, 8th August 2007, The Conclave, Kolkata, India (Funded by Heinrich Boll Foundation, Germany). 

• Resource person for sessions on "Financing Environmental Projects and Environmental Reporting and Verification", Training Programme for Non-ISS Statistical Personnel on "Natural Resources Accounting Techniques" Indian Institute of Forest Management (IIFM), Bhopal, 12-16 February 2007. 

• Taught "Environmental Finance" for PFM graduate students at the Indian Institute of Forest Management (IIFM), Bhopal, February 2007.
  

• Series of Invited Lectures at the Department of Civil Engineering, University of Ulsan, Korea (January-February 2007).
  

• Invited speaker, Envrionmental Economics Workshop, Institute of Economic Growth (IEG), New Delhi, India, 30th November 2006.
  

• Panel Member, on "How to Bring the Global Concerns into Urban Context", Organized by the Urban Environmental Management group of IGES, JAPAN at the International Open Science Meeting of International Human Dimensions Program (IHDP), Bonn, Germany 10-13 October 2005.
  

• Open AIT lecture on "The Delhi Decision Is it a sustainable pathway for better air quality management in the other developing countries in Asia", 26th January 2004, Asian Institute of Technology (AIT) Thailand.

• Invited Speaker, "Environmental Economics Training Programme for Indian Economic Services/Indian Statistical Services Offices", Sponsored by the World Bank, 6th February 2003, Gokhale Institute of Politics and Economics, Pune, India.
  

• Invited Speaker at the BAQ 2002, an international workshop on Better Air Quality in Asia and pacific Rim Cities held in Hong Kong supported by the Asian Development Bank(ADB)

• Institute Level Invited Talk on "Pesticide Removal Using Indigenous Wood Charcoal" at Birla Institute of Technology and Science (BITS), Pilani, India on 30 August 2001.

• Invited Speaker, Workshop on Advanced Waste Minimization and Management Technologies, Department of Civil Engineering, Indian Institute of Technology (IIT), Kharagpur, November 2000.

• Resource person, Environmental Economics Training Programme under the sponsorship of the World Bank's Environmental Management Capacity Building Project, IGIDR, Mumbai, July 13-16, 2000.