is a Senior Engineer with LimnoTech in Washington DC. His 25 years of experience include a wide array of assignments, especially in urban water issues including flood risk management, water supply, watershed restoration, climate change impacts, and the application of green infrastructure for stormwater management. He has led projects in North America, Latin America, the Caribbean, Europe, and the Middle East and has been invited as keynote speaker on the subject of green infrastructure for several international conferences. Dr. Medina is an active member of the Water Environment Federation (WEF), the Urban Water Resources Research Council in the Environmental & Water Resources Institute (EWRI) of the American Society of Civil Engineers (ASCE), and has served in EWRI's Technical Committees to advance research in green infrastructure. He was invited to testify before the U.S. Senate Environment & Public Works Committee on the effects of uncontrolled highway runoff on receiving waters. Dr. Medina is a Founding Diplomate of the American Academy of Water Resources Engineers and has authored over 80 publications, presentations, and workshops on urban watershed issues. He was co-editor of the latest Manual of Practice for Design of Urban Stormwater Controls published jointly by WEF and ASCE. He is a consultant for the World Bank and was formerly a professor of Civil Engineering at Northeastern University in Boston, Massachusetts.