Clean Harbors, Inc. announced the appointment of Alison Quirk and Shelley Stewart Jr. to its board of directors, effective immediately. Ms. Quirk is former Executive Vice President, Chief Human Resources and Citizenship Officer at State Street Corporation. Mr. Stewart leads consulting firm Bottom Line Advisory LLC as Managing Partner and is former Chief Procurement Officer at DuPont and at Tyco International.

The appointments expand the Clean Harbors board to 12 members, 11 of whom are independent. Ms. Quirk and Mr. Stewart were appointed as Class I directors whose term will expire at Clean Harbors' 2023 annual meeting of shareholders. She will serve on the Compensation Committee.

He will serve on the Environmental, Health and Safety Committee. Ms. Quirk retired from State Street in 2017 where she worked for 15 years, the last seven as a member of the company's senior-most strategy and policy making group. As Chief Human Resources and Citizenship Officer, she was responsible for all aspects of human resources and corporate citizenship, leading a global team of more than 500 people.

Prior to State Street, Ms. Quirk spent two decades in HR and business planning roles at FleetBoston Financial, Liberty Financial Companies and Boston Financial Data Services, Inc. Ms. Quirk is a member of the Compliance Committee of Wynn Resorts, responsible for ensuring compliance with federal, state, local and gaming laws. She is an advisor for King Boston. She previously served on the Legg Mason Board of Directors as a member of the Finance Committee and the Nominating and Governance Committee, as well as Chairperson of the Compensation Committee.

She also served on a special committee of the board that oversaw the sale of Legg Mason. She holds a bachelor's degree in Communications from the University of New Hampshire. Mr. Stewart retired in 2018 after six years as Chief Procurement Officer at DuPont 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 and oversaw multiple lean six sigma initiatives. 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 around global sourcing.

Mr. Stewart currently serves on the boards of Otis Worldwide and Kontoor Brands, where he sits on their nominating and governance, and audit 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 spent several years serving on the board of directors for the Institute for Supply Management.

He 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.