Waste Management, Inc. announced that its Board of Directors has elected Kathleen (Kathy) M. Mazzarella as Chairman of the Board to replace retiring Chairman Thomas (Tom) H. Weidemeyer, which was effective as of the 2023 Annual Meeting of Stockholders conducted on May 9, 2023. Mazzarella was first elected to WM's Board of Directors in 2015. Over the last eight years, she served on the Board's Management Development and Compensation Committee and Nominating and Governance Committee, most recently also serving as the Chairman of that committee.

Mazzarella is the Chairman, President and Chief Executive Officer of Graybar Electric Company, Inc., a leading distributor of electrical, communications and data networking products and provider of related supply chain management and logistics services. During her more than 40-year tenure at Graybar, Mazzarella has held numerous executive-level positions in operations, sales, human resources, strategic planning and marketing. She has been instrumental in developing and communicating Graybar's commitment to ESG initiatives.

Mazzarella also serves on the Board of Directors of Cigna Corporation and Core & Main, and she previously served as Chairman of the Federal Reserve Bank of St. Louis.