KATHLEEN M. MAZZARELLA

Corporate Board Profile

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WASTE MANAGEMENT INC

Filing Date Source Excerpt
2016-03-25 Chairman, President and Chief Executive Officer — Graybar Electric Company, Inc. (distributor of electrical, communications and data networking products and provider of related supply chain management and logistics services) since January 2013.
2017-03-24 Chairman, President and Chief Executive Officer — Graybar Electric Company, Inc. (distributor of electrical, communications and data networking products and provider of related supply chain management and logistics services) since January 2013.
2018-03-27 Ms. Mazzarella has experience serving as the chief executive of a large corporation, developing expertise in the areas of logistics and supply chain management. During her 38-year tenure at Graybar, Ms. Mazzarella has held executive-level positions in sales, human resources, strategic planning and marketing.
2019-03-27 Ms. Mazzarella has experience serving as the chief executive of a large corporation, developing expertise in the areas of logistics and supply chain management. During her 39-year tenure at Graybar, Ms. Mazzarella has held executive-level positions in sales, human resources, strategic planning and marketing.
2020-03-27 Ms. Mazzarella has experience serving as the chief executive of a large corporation, developing expertise in the areas of logistics and supply chain management. During her 40-year tenure at Graybar, Ms. Mazzarella has held executive-level positions in sales, human resources, strategic planning and marketing.
2021-03-31 Chairman, President and Chief Executive Officer — Graybar Electric Company, Inc. (distributor of electrical, communications and data networking products and provider of related supply chain management and logistics services) since 2013.
2022-03-29 Chairman, President and Chief Executive Officer — Graybar Electric Company, Inc. (distributor of electrical, communications and data networking products and provider of related supply chain management and logistics services) since 2013.
2023-03-28 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.
2024-04-02 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.
2025-04-01 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.

Data sourced from SEC filings. Last updated: 2025-07-16