WM Non-Executive Chairman of the Board since 2023

Independent Director since: 2015

Kathleen Mazzarella has served as 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, since 2012, and as Chairman since 2013. During her more than 40-year tenure at Graybar, Ms. Mazzarella has held numerous executive-level positions in operations, sales, human resources, strategic planning and marketing, including Executive Vice President and Chief Operating Officer, Senior Vice President – Sales and Marketing and Senior Vice President – Human Resources and Strategic Planning.

Ms. Mazzarella has been instrumental in developing and communicating Graybar’s commitment to sustainability initiatives. Graybar focuses on sustainability in the way it operates and in the innovative solutions it provides to its customers. The company offers energy-saving products, renewable energy solutions and supply chain services that support sustainable construction, renovation and maintenance of infrastructure and facilities. The company also invests in the communities it serves and emphasizes integrity, inclusion, and opportunity for all employees.

Ms. Mazzarella brings her deep and valuable experience leading a diverse range of business functions necessary for an employee-driven, customer-focused business, similar to WM. Through her role as Chief Executive Officer and her service on the board of directors for other public companies, she has developed expertise in evolving social and governance initiatives. In addition to her experience overseeing financial reporting and controls, technology systems and platforms, and other functional and operational areas, she has particular experience in the area of human capital management, including succession planning and inclusion, equity and diversity initiatives. Ms. Mazzarella also brings expertise in labor relations, public policy, operational innovation and strategic planning.

Ms. Mazzarella holds an associate degree in telecommunications engineering, a bachelor’s degree in applied behavioral sciences from National Louis University, and a master’s degree in business administration from Webster University.

Ms. Mazzarella currently serves as a director of Cigna Corporation and as a director of Core & Main, a distributor of water, sewer, fire protection and storm drain products. She also serves on the board of the National Association of Wholesaler-Distributors (NAW) and previously served on the board of the NAW Institute for Distribution Excellence.

Ms. Mazzarella previously served as Chairman of the Federal Reserve Bank of St. Louis, and she has experience serving on various organizational and charitable boards, such as Greater St. Louis Inc., United Way of Greater St. Louis and the Saint Louis Club.