Board of Directors

Mr. Wetherbee became President and CEO of ATI in 2019. and was named Board Chair in 2021. Prior to that, he was ATI’s Executive Vice President, Flat Rolled Products since January 2015, and President, ATI Flat Rolled Products beginning in April 2014. Mr. Wetherbee was President and Chief Executive Officer of Minerals Technologies, Inc. from March 2013 until February 2014. He was President of ATI’s tungsten materials business from 2010 through 2012 and Vice President of Market Strategy of Alcoa Inc. from 2006 through 2009.

Mr. Ball is President and Chief Executive Officer of Koppers Holdings Inc., a leading integrated global provider of treated wood products, wood treatment chemicals and carbon compounds. Mr. Ball previously served as Koppers’ Chief Operating Officer and Chief Financial Officer. Since becoming CEO in January 2015, Mr. Ball led Koppers’ transformation into a company prioritizing customer-focused solutions that enhance and preserve wood while de-emphasizing its focus on commodity products serving the aluminum industry. During that time, he has overseen several acquisitions and divestitures to strategically re-shape the company’s portfolio and increase shareholder value. Prior to joining Koppers, Mr. Ball was Senior Vice President and Chief Financial Officer of Calgon Carbon, Inc., a provider of services, products and solutions for purifying water and air.

Mr. Ball is Chair of the Audit & Risk Committee and is a member of both the Personnel & Compensation Committee and the Technology Committee.

General Carlisle has been President and Chief Executive Officer of the National Defense Industrial Association (NDIA) since March 2017, when he retired from the United States Air Force as a four-star general following a 39-year military career. His last Air Force assignment was as Commander, Air Company Command at Langley Air Force Base in Virginia. Prior to that, he was the Commander of the Pacific Air Forces, the air component Commander for the U.S. Pacific Command, and served as executive director of Pacific Air Combat Operations staff, Joint Base Harbor in Hawaii, following various operational and staff assignments throughout the Air Force, including as chief of air operations, U.S. Central Command Forward in Riyadh, Saudi Arabia and as director of legislative liaison at the Office of the Secretary of the Air Force.

General Carlisle is a member of the Finance Committee, Audit Committee and of the Technology Committee.

Upon her retirement in 2008, Ms. Corvi concluded a 34-year career with The Boeing Company, a diversified aerospace company, where she most recently served as Vice President, General Manager of Airplane Programs, Boeing Commercial Airplanes, a position she held from 2005 until her retirement.

Ms. Corvi is Chair of the Personnel & Compensation Committee and is a member of both the Technology Committee and the Nominating & Governance Committee.

Prior to his retirement in 2010, Mr. Diggs was Senior Vice President and General Counsel of PPG Industries, Inc., a producer of coatings, glass and chemicals, since 1997. He held the position of Secretary from 2004 to 2009.

Mr. Diggs is Chair of the Nominating & Governance Committee and is a member of the Audit & Risk Committee.

Mr. Harvey previously served as Chairman Emeritus of CONSOL Energy Inc., a leading diversified energy company in the United States from May 2016 to May 2017. He was Chairman of CONSOL from 2010 until his retirement in May 2016 and was Executive Chairman from May 2014 to January 2015. Mr. Harvey was Chief Executive Officer of CONSOL from 1998 until May 2014. He also served as President from 1998 until 2011. Mr. Harvey was Chairman of CNX Gas Corporation, a subsidiary of CONSOL from 2009 to 2010 and was a member of its board from 2005 to 2014.

Mr. Harvey currently serves as Lead Independent Director and is a member of the Nominating & Governance Committee and the Personnel & Compensation Committee.

Mr. Hess has 40 years of experience in the aerospace industry, including 38 at United Technologies Corporation where he retired as Executive Vice President and Chief Customer Officer for Aerospace. From 2009 to 2014 he was President of Pratt & Whitney, responsible for the company’s global operations in the design, manufacture and service of engines for commercial and military aircraft. Most recently, Mr. Hess served as the CEO and a board member for Arconic Corporation. Hess was a 10-year member of the Aerospace Industries Association (AIA) Board of Governors Executive Committee, serving as Chairman in 2012. He is also a Fellow of the Royal Aeronautical Society.

Mr. Hess is Chair of the Technology Committee and a member of both the Personnel & Compensation Committee and the Nominating & Governance Committee.

Ms. Kah is a global energy and raw materials markets expert with tremendous experience in board-level strategic planning and risk analysis. As Chief Economist for ConocoPhillips until 2017, she developed market outlooks, risk assessments and scenario plans that drove corporate strategy. Ms. Kah is a thought leader in global public policy, serving as an adjunct senior research scholar and Advisory Board member of Columbia University’s Center on Global Energy Policy. She is President of the U.S. Association for Energy Economics.

Ms. Kah serves on the Audit Committee and the Technology Committee.

Mr. Morehouse is Executive Vice President of the Pittsburgh Steelers, where he guides the strategic direction of Acrisure Stadium operations in addition to serving as senior advisor to the President on Steelers business operations and collaborates on the team's community and NFL-related initiatives. Previously he was Chief Executive Officer and President of Pittsburgh Penguins, LLC, which owns and operates the Pittsburgh Penguins National Hockey League team. Mr. Morehouse holds a master’s degree from Harvard’s John F. Kennedy School of Government and has extensive government relations experience, having previously worked in the Clinton administration, at the Pentagon, and on four presidential campaigns. He is a member of the Audit & Risk and Technology Committees.

Ruby Sharma Retired Managing Partner of RNB Strategic Advisors and retired senior partner of Ernst & Young LLP. Ms. Sharma served as Managing Partner of RNB Strategic Advisors from 2018 to 2022. Prior to that, she was senior partner at Ernst & Young for 15 years until her retirement in 2017. She was a longtime member of the Center for Audit Quality’s Audit Committee Effectiveness Task Force and the American Institute of Certified Public Accountants (AICPA), serving on its Forensic Litigation Services Subcommittee. Ms. Sharma is a member of both the Audit and Risk Committee and Technology Committee.