Kathleen M. Mazzarella

Kathy Mazzarella has served as Chairman, President and Chief Executive Officer of Graybar Electric Company, Inc. ("Graybar"), a distributor of electrical, communications and data networking products and provider of related supply chain management and logistics services, since January 2013. She previously served as Executive Vice President and Chief Operating Officer from December 2010 to June 2012. Ms. Mazzarella joined Graybar in January 1980, and has held increasing roles of seniority, including Senior Vice President, Sales and Marketing and Senior Vice President, Human Resources and Strategic Planning. She has served as a Director of Graybar since January 2004, was appointed President and Chief Executive Officer in June 2012 and has served as Chairman since January 2013. Ms. Mazzarella has served as a director of the Federal Reserve Bank of St. Louis since January 2015, serving as its Chairman since April 2016. She has served on the Board of Waste Management Inc., an American waste management, comprehensive waste, and environmental services company, since October 2015 and has served on the Board of Core & Main, a distributor of water, sewer, fire protection and storm drain products, since January 2019. Ms. Mazzarella served on the Board of Express Scripts Holding Company from June 2017 until the company merged with Cigna in December 2018.