Clean Harbors, Inc. announced that it has appointed Chief Operating Officer Eric W. Gerstenberg and Chief Financial Officer Michael L. Battles as co-CEOs of the Company, effective March 31, 2023. As part of a long-planned transition, they will be succeeding Clean Harbors' founder Alan S. McKim, who has been CEO for the past 42 years. Battles and Gerstenberg will work together as co-CEOs to jointly direct the day-to-day operations and continued growth of the Company.

Gerstenberg joined Clean Harbors in 1989 and during the past thirty years he has held a variety of positions of increasing responsibility throughout the organization. He was most recently Chief Operating Officer – a position he has held since 2015 – where he had responsibility for the Company's environmental sales & service organization, all of its facilities including incinerators and re-refineries, and oversaw the majority of its workforce. After a long career in public accounting at Deloitte & Touche and as a finance leader at PerkinElmer, Inc. Battles joined Clean Harbors in 2013 as Chief Accounting Officer before being elevated to Chief Financial Officer in 2016.

Since that time, he has overseen the Company's entire finance organization, including multiple debt raises and refinancings, as well as taking on some strategic and operational oversight. He is also a member of the Board of Directors of Casella Waste Systems Inc.