CO-CEO
Eric W. Gerstenberg is the Co-Chief Executive Officer (Co-CEO) of Clean Harbors Inc. (CLH), a Norwell, Massachusetts-based provider of environmental and industrial services.[[1]](https://www.wastetodaymagazine.com/news/clean-harbors-adds-co-ceos-to-board-of-directors/)[[4]](https://www.epw.senate.gov/public/_cache/files/a/6/a658288c-7d96-415c-b183-7b33d408d2d5/FD0092E940B511531D9846174837CE431DF34ABF6044FF7F20D64ACA0A10575C.11-19-2025-gerstenberg-testimony.pdf) He joined the company in 1989 as a field lab technician and advanced through roles including managing business units in Natick, MA, Baltimore, and Chicago; president of environmental, industrial & field services; vice president of disposal services; executive vice president for environmental services; and Chief Operating Officer (COO) since 2015, overseeing environmental sales, services, facilities, incinerators, re-refineries, and most of the workforce.[[1]](https://www.wastetodaymagazine.com/news/clean-harbors-adds-co-ceos-to-board-of-directors/)[[2]](https://ecs.syracuse.edu/about/news/environmental-excellence-eric-gerstenberg-89)[[3]](https://www.comparably.com/companies/clean-harbors/eric-w-gerstenberg) Named Co-CEO in 2023 alongside Michael Battles, he joined the board as a Class III director, supporting the company's Vision 2027 growth strategy.[[1]](https://www.wastetodaymagazine.com/news/clean-harbors-adds-co-ceos-to-board-of-directors/)
Gerstenberg holds a bachelor's degree in aerospace engineering from Syracuse University, where he credits his engineering and problem-solving skills for his success, and completed the Advanced Management Program at Harvard Business School.[[1]](https://www.wastetodaymagazine.com/news/clean-harbors-adds-co-ceos-to-board-of-directors/)[[2]](https://ecs.syracuse.edu/about/news/environmental-excellence-eric-gerstenberg-89) In November 2025, he testified before the U.S. Senate Committee on Environment and Public Works on PFAS cleanup and disposal, highlighting Clean Harbors' expertise in hazardous waste management, incineration, emergency response (e.g., Deepwater Horizon, East Palestine derailment), and PFAS destruction testing with EPA and Pentagon partnerships.[[4]](https://www.epw.senate.gov/public/_cache/files/a/6/a658288c-7d96-415c-b183-7b33d408d2d5/FD0092E940B511531D9846174837CE431DF34ABF6044FF7F20D64ACA0A10575C.11-19-2025-gerstenberg-testimony.pdf)
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