Biography

Shelley Stewart, Jr., an independent Director of the Company since 2022, is Managing Partner at Bottom Line Advisory LLC. Mr. Stewart left DuPont in 2018 after six years as Chief Procurement Officer where he led procurement, global sourcing and logistics, as well as real estate and facility services. Prior to joining DuPont in 2012, he spent nearly a decade at Tyco International, where he was Senior Vice President of Operational Excellence and Chief Procurement Officer. Previously, he held senior executive supply chain positions at Raytheon and Invensys PLC. He also spent 19 years at United Technologies Corporation, where he held numerous positions focused on global sourcing. Mr. Stewart serves on the boards of Otis Worldwide (NYSE:OTIS) and Kontoor Brands (NYSE:KTB), where he sits on the Audit and Nominating and Governance committees. He also serves on the Board of Trustees of Howard University and the Board of Governors for the University of New Haven. He previously served on the board of directors for the Institute for Supply Management. Mr. Stewart holds a bachelor’s degree and master’s degree in Criminal Justice from Northeastern University, and received his MBA from the University of New Haven. He brings to the Board significant expertise in the areas of logistics, supply chain management and operational excellence. His strategic insights, combined with his chemical industry background, will be a significant asset to Clean Harbors as the Company continues to execute its growth strategy.