Board of Directors

Diane C. Creel

, Chair of the Board of Directors of Allegheny Technologies Incorporated Retired Chair, Chief Executive Officer and President of Ecovation, Inc., a waste stream technology company using patented technologies

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Prior to her retirement in 2008, Ms. Creel served as Chairman, Chief Executive Officer and President of Ecovation, Inc., a subsidiary of Ecolab Inc. and a food manufacturing waste stream technology company using patented technologies, beginning in 2003. Ecovation, Inc. became a subsidiary of Ecolab Inc. in 2008. From 1992 to 2003, Ms. Creel served as Chief Executive Officer and President of Earth Tech, an international consulting engineering firm, which became a subsidiary of Tyco International in 1996.

Ms. Creel served as Lead Independent Director from 2011-2019, when she became Board Chair. Ms. Creel is Chair of the Nominating and Governance Committee and a member of the Personnel and Compensation Committee.

Leroy M. Ball

, President and Chief Executive Officer, Koppers Holdins Inc.

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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 serves on the Audit Committee, Personnel & Compensation Committee, and Technology Committee.

Herbert J. Carlisle

, Retired four-star general in the United States Air Force and current President and Chief Executive Officer of the National Defense Industrial Association

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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.

Carolyn Corvi

, Retired Vice President, General Manager of Airplane Programs, Boeing Commercial Airplanes, The Boeing Company, a diversified aerospace company

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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 Technology Committee and a member of the Nominating and Governance Committee, and the Personnel and Compensation Committee.

James C. Diggs

, Retired Senior Vice President and General Counsel of PPG Industries, Inc., a producer of coatings, glass and chemicals

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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 Finance Committee and also serves on the Audit Committee and the Nominating and Governance Committee.

J. Brett Harvey

, Previously served as Chairman Emeritus of CONSOL Energy, Inc., a leading diversified energy company in the United States.

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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 on the Finance Committee, Nominating and Governance Committee and the Personnel and Compensation Committee.

David P. Hess

, Retired EVP and Chief Customer Officer for Aerospace, United Technologies Corporation, a global leader in aerospace and technology; formerly President, Pratt & Whitney

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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 interim 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 serves on the Finance Committee and the Nominating & Governance Committee.

Marianne Kah

, Retired Chief Economist for ConocoPhillips, world's largest independent exploration and production company, and current adjunct senior research scholar at Columbia University's Center on Global Energy Policy

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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.

David J. Morehouse

, Chief Executive Officer and President of Pittsburgh Penguins LLC, which owns and operates the Pittsburgh Penguins National Hockey League team

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Mr. Morehouse is Chief Executive Officer and President of Pittsburgh Penguins LLC, which owns and operates the Pittsburgh Penguins National Hockey League team. He was named President of the Pittsburgh Penguins in 2007 and has also served as Chief Executive Officer since 2010. He joined the Pittsburgh Penguins in 2004 as a consultant for special projects, including the team’s new arena.

Mr. Morehouse is a member of the Audit Committee and the Technology Committee

John R. Pipski

, Retired tax partner of Ernst & Young LLP, a public accounting firm

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Mr. Pipski was a tax partner of Ernst & Young LLP, a public accounting firm, until his retirement in 2001. Thereafter, he provided business advisory and financial and tax accounting services through his own firm until 2013.

Mr. Pipski is Chair of the Audit Committee and a member of the Finance Committee.

James E. Rohr

, Retired Chairman and Chief Executive Officer of the PNC Financial Services Group, Inc., a diversified financial services organization

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Mr. Rohr served as Executive Chairman of The PNC Financial Services Group, Inc., a diversified financial services organization, from May 2013 until his retirement in April 2014. Previously, he was Chairman from 2001 until April 2013 and Chief Executive Officer from 2000 until April 2013. He served as President of The PNC Financial Services Group from 1990 to 2002.

Mr. Rohr is Chair of the Personnel and Compensation Committee.

Robert S. Wetherbee

, President and Chief Executive Officer

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Mr. Wetherbee became President and CEO of ATI in 2019. 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.