Dennis Dreher

Dennis Dreher

Senior Consultant - Geosyntec Consultants

Dennis Dreher is a Senior Consultant with Geosyntec Consultants. He specializes in green infrastructure and watershed planning and in working with clients, staff engineers, and ecologists to identify and incorporate conservation design practices into new residential, commercial, and institutional development projects.

He was formerly the Director of Natural Resources for the Northeastern Illinois Planning Commission, where he managed a variety of water and natural resource projects for over twenty-five years. He was the principal author of the Chicago Wilderness Green Infrastructure Vision and serves on the regional Green Infrastructure Vision Task Force. His areas of expertise include conservation design, sustainable development, stormwater and floodplain management, stream and wetland protection, water quality planning, watershed management, and biodiversity protection.

Mr. Dreher has written or assisted in the development of numerous water and natural resources publications, including model ordinances, guidebooks, and watershed plans. He holds a B.S. and M.S. in Environmental Engineering from Purdue University and the University of Illinois, respectively. Mr. Dreher also serves as the Vice-Chair of the Corporate Council of the Chicago Wilderness consortium.

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