Greg Zimmerman

Vice President / Aquatic Biologist

Greg Zimmerman is Vice President of EnviroScience, Inc., where he coordinates major projects and company-wide initiatives. Greg manages the Marine Services Group, which includes a team of 10 full-time commercial and scientific diving staff. Greg has been with EnviroScience since 1996 and specializes in the fields of aquatic survey, diving, and freshwater mussel identification. 

An approved USFWS freshwater mussel surveyor, Greg has worked extensively with over 90 species throughout the U.S.—including seven federally-listed and numerous state-listed species. He has designed and managed some of the largest Endangered Species Act and biological monitoring survey projects completed to date in North America. Additionally, Greg has completed eleven Biological Assessments for transportation-related projects, and he has assisted numerous other clients with projects where aquatic impacts were anticipated. 

Greg received a master’s degree from Kent State University in GIS / Biology and an undergraduate degree from Hiram College. He has created GIS environments for a wide range of applications, including wetlands, larval fish migration, 316a and 316b, benthic habitat, depth surveys, and natural resource inventories.

Greg has over 16 years of diving experience, including surface-supplied and hardhat diving, and he maintains a number of specialty dive certifications. He is an active member of the Freshwater Mollusk Conservation Society (where he is Secretary and serves on the Techniques and Guidelines Committee), the Association of Diving Contractors International (ADCI), and the Ohio River Valley Ecosystem Mollusk Group. Greg was also an adjunct faculty member at Hiram College, where he taught an upper-level course in biomonitoring.

Contact Greg at: GZimmerman @ EnviroScienceInc.com


Few environmental firms in the country retain EnviroScience’s degree of scientific know-how, talent, and capability under one roof. The diverse backgrounds of our biologists, environmental engineers, scientists, and divers enable us to provide comprehensive in-house services and an integrated approach to solving environmental challenges—saving clients time, reducing costs, and ensuring high-quality results. Our client guarantee is to provide “Excellence in Any Environment” meaning no matter what we do, we will deliver on our Core Values of respect, client advocacy, quality work, accountability, teamwork, and safety. EnviroScience was created with the concept that we could solve complex problems by empowering great people. This concept still holds true today, as our scientists explore the latest in environmental legislation and regulations and incorporate the most up-to-date technology to gather and report data.

EnviroScience expertise includes but is not limited to: aquatic survey (including macroinvertebrate surveys and biological assessments); ecological restoration; ecological services (including impact assessments, invasive species control, and water quality monitoring);  emergency response; engineering and compliance services; endangered mussel surveys; laboratory and analysis; stormwater management; threatened and endangered species; and wetlands and streams (including delineation and mitigation). Further, EnviroScience is one of the few biological firms in the country that is a general member of the Association of Diving Contractors International (ADCI) and offers full-service commercial diving services.