• American Academy of Environmental Engineers and Scientists, USA (2014-Present)
• Board Certified Environmental Engineering Member (2014-Present)

• Scientific and Technical Advisory Committee, Chesapeake Bay Program, USA (2006-Present)
• Executive Board (2010-2014)
• Alignment Action Team (2011-2014)

• Water Environment Federation (WEF), USA (1985-Present)
• Municipal Wastewater Treatment Design (MWTD) Committee (2004-Present)
• Volunteers of the Future Task Group (2013-2014)
• MRRD Liaison for Algal Biomass Organization (2010-2012)
• Biofuels Technology Task Force (2010-2012)
• WEF Representative, Energy Star Program, United States Environmental Protection Agency (2004-2008)
• Nutrient Control Task Force (1993-1998, 2006-2010)
• Design of Municipal Wastewater Treatment Plants Manual of Practice (MOP8) Review Group (2006-2010)
• Energy Efficiency Group (2006-2008)
• WEF Representative, Optimization of Wastewater and Solids Operations Group, Water Environment Research Foundation (2007-2012)
• Literature Review Committee (2006-2012)

• Pennsylvania Water Environment Association (PWEA), USA
• Research Committee (2000-2001, 2006-Present)
• Training Committee (2006-Present)

• International Water Association, UK
• Specialist Group on Anaerobic Digestion
• Specialist Group on Lake and Reservoir Management
• Specialist Group on Nutrient Removal and Recovery
• Specialist Group on Sanitation and Water Management in Developing Countries
• Specialist Group on Waste Stabilization Ponds
• Specialist Group on Water Reuse

• Scientists without Borders

• International Professors Project (2006-Present)
• Board of Directors (2006-2010)

Life Memberships

• Indian Environmental Association
• Indian Association for Environmental Management
• Solar Energy Society of India