George S. Barrett

Founder, The Overtone Group, L.L.C. / Former Chairman & CEO, Cardinal Health, Inc.


George S. Barrett is the Founder of The Overtone Group, L.L.C., an advisory firm focused on providing strategic and operational guidance to profit and non-profit organizations, and on the development of C-suite and emerging leaders. He previously served as Chairman & Chief Executive Officer of Cardinal Health, Inc., a global integrated healthcare services and products company from August 2009 until the end of 2017, when he became Executive Chairman, a position he held until November 2018. Mr. Barrett previously held a number of executive positions with global pharmaceutical manufacturer Teva Pharmaceutical Industries Ltd., including Chief Executive Officer of its North American business and Executive Vice President for global pharmaceuticals. 

Skills and qualifications

Mr. Barrett provides the Board with senior leadership, human capital management, capital deployment, global supply chain, financial management, risk management, reputation management, and environmental, social, and governance skills developed over his more than 30 years of service in the healthcare industry with Cardinal Health, Teva, and Alpharma Inc. During that time, he held executive leadership positions with escalating levels of responsibility, culminating in his role as Chairman and CEO of Cardinal Health where he was responsible for many of the functions requiring those skills. Mr. Barrett also teaches leadership at both Columbia University Mailman School of Public Health and at NYU Stern School of Business and serves as a Co-Chair of the National Academy of Medicine Action Collaborative on Decarbonizing the U.S. Health Sector. In addition, his service on other public company boards, including experience as a board chair, has enhanced his skills and strengthens the Board’s collective oversight capability. He also has experience with the roles and responsibilities of different board committees through current or prior service on the audit, compensation, and finance committees of other public company boards. 

Other public company boards

Current Within past five years Other past boards

Montes Archimedes Acquisition Corp.

Cardinal Health, Inc. 

Eaton Corporation plc