Dr. Contreras has a Ph.D. in Environmental Chemistry from Technical University of Leuna-Merseburg, Germany and a bachelor\'s degree in Chemistry from Universidad Autónoma de Santo Domingo. He is a teacher and researcher at the Instituto Tecnológico de Santo Domingo and director of the Center for Environmental Management (CEGA-INTEC). He was a Coordinator of the USAID Environmental Protection Programm executed by INTEC in alliance with The Nature Conservancy (TNC) from 2009 to 2012. From 2013 to 2016 he was a researcher in the project “Hydric Safety and Climate Change in Central América and the Caribbean: Yaque del Sur River´s Basin” sponsored by The International Development Research Centre (IDRC) of Canada. He is a president of the National Steering Committee of the Small Grants Programme of the United Nations Development Programme (UNDP). He has 28 years of experience on environmental management projects in the Dominican Republic. He has extensive experience in providing technical assistance to government agencies, non-governmental organizations and community members for site-based and system-level natural resource management projects sponsored by the Gemeinsan International Zuzammenarbeit (GIZ), German Technical Cooperation, Friedrich Naumann Foundation, and the KFW (German Development Bank). Dr Contreras prepared Guidelines of Environmental Education for the Ministry of Education of the Dominican Republic. Mr. Contreras has designed and facilitated training workshops for the GTZ.