Martina McIsaac

Martina McIsaac is President and Chief Executive Officer for MSC Industrial Supply Co. She most recently served as President and Chief Operating Officer from September 2024 to December 2025 and Executive Vice President and Chief Operating Officer from October 2022 to September 2024. Ms. McIsaac was appointed to the Board to serve as a director in January 2026.

Ms. McIsaac has held senior management positions responsible for key business functions of the Company and is a key contributor to our current strategy and success. In addition, she brings critical perspectives to the Board on our strategic direction and growth strategy. Prior to joining the Company, Ms. McIsaac was with Hilti Corporation, a multinational company that develops, manufactures and markets hardware, software and services for the construction, building maintenance, energy and manufacturing industries, for nine years. Most recently, she served as Region Head and Chief Executive Officer of Hilti, Inc., leading the North America organization. Prior to joining Hilti, Ms. McIsaac held a series of progressively responsible leadership roles with Avery Dennison, a Fortune 500 global materials science and manufacturing company. During her 14-year tenure with Avery Dennison, Ms. McIsaac served in a range of sales, marketing, business development and operational roles in Mexico, Argentina, Chile, Canada and the U.S. prior to being named Vice President and General Manager of the Performance Polymers Division.

Ms. McIsaac holds a bachelor's degree in economics from Western University and a master's degree in international business from the University of South Carolina, where she serves on the board of the Folks Center for International Business. Ms. McIsaac is a signatory to the Catalyst CEO Champions for Change pledge, joining other high-profile leaders who are personally committed to helping organizations solve business challenges by attracting and retaining talent, fostering innovation and driving performance. She is a member of the Appalachian State University Supply Chain Advisory Board, the Texas Women's Foundation's Economic Leadership Council, a past chair of the Dallas Habitat for Humanity Women Build and past member of the Board of Directors for United Way of Metropolitan Dallas.