Tom Bartlett

Director

Mr. Bartlett has been a Director since May 2020. In April 2009, he joined American Tower as Executive Vice President and Chief Financial Officer and assumed the position of President and Chief Executive Officer in March 2020. Prior to joining American Tower in April 2009, Mr. Bartlett served as Senior Vice President and Corporate Controller with Verizon Communications, Inc. During his 25-year career with Verizon Communications and its predecessor companies and affiliates, he served in numerous operations and business development roles, including President and Chief Executive Officer of Bell Atlantic International Wireless from 1995 through 2000, where he was responsible for wireless activities in North America, Latin America, Europe and Asia.

In addition, Mr. Bartlett served as CEO of Iusacell, a publicly traded, nationwide cellular company in Mexico; CEO of Verizon's Global Solutions Inc., a global connectivity business providing lit and dark fiber primarily to global enterprises; and as an Area President for Verizon’s U.S. wireless business, responsible for all operational aspects of the business in the Northeast and Mid-Atlantic states. Mr. Bartlett began his career at Deloitte, Haskins & Sells. He is a member of the World Economic Forum’s Information and Communications Technologies (ICT) Board of Governors, the National Association of Real Estate Investment Trust (NAREIT) Executive Committee, the Business Roundtable and the New England Technology Executive Summit. He served on the Board of Directors of Equinix, Inc. from April, 2013 to August, 2021. He currently sits on the Samaritan’s advisory council, on the Board of Advisors of the Rutgers Business School and on the Massachusetts Institute of Technology CEO Advisory Board. Mr. Bartlett earned an M.B.A. from Rutgers University and a Bachelor of Science in Engineering from Lehigh University.

Kelly C. Chambliss

Director

Ms. Chambliss has been a Director since March 2022. She currently serves as the Senior Vice President and Chief Operating Officer at IBM Consulting. Prior to this role, Ms. Chambliss was Senior Vice President of IBM Consulting, Americas and Strategic Sales. Ms. Chambliss served in various other senior leadership roles at IBM from late 2002, including as the Chief Technology Officer for IBM Global Business Services (GBS) and as the Managing Partner for the Industrial and Distribution Markets in GBS within the United States. Ms. Chambliss joined IBM through the acquisition of PricewaterhouseCoopers (PwC) Consulting, where she was a Partner. Ms. Chambliss was an Independent Director on the Board of Directors for CoreSite Realty Corporation from September 2016 through December 2021, when it was acquired by American Tower. She graduated from Virginia Tech with a degree in Management Science and a specialization in Decision Support Systems.

Teresa H. Clarke

Director

Ms. Clarke has been a Director and member of the Audit Committee since December 2021. Since 2010, Ms. Clarke has served as Chair & CEO of Africa.com LLC, a media holding company with an extensive array of platforms that reach a global audience interested in African content and community. Prior to founding Africa.com, Ms. Clarke was a Managing Director in the investment banking division of Goldman Sachs & Co. for over 12 years, where she led corporate finance and merger & acquisition transactions for corporate clients in the industrials and real estate sectors (1989 to 1995 and 2004 to 2010, respectively). Ms. Clarke currently serves on the board of directors of Arthur J. Gallagher, the global insurance brokerage with operations in 56 countries. She served on the board of Australian fintech, Change Financial from 2016 to 2020, and as board chair from 2018 to 2020. She also served on the board of Cim Finance, a financial services company, from 2016 to 2020. She served on President Obama’s Advisory Council on Doing Business in Africa from 2014 to 2016. She is on the Leadership Council of Women Corporate Directors (New York) and is a member of the Council on Foreign Relations and the Advisory Board of the Rhodes Scholarship for West Africa.

Raymond P. Dolan

Director

Mr. Dolan has been a Director since February 2003. In June 2016, Mr. Dolan was reappointed to the Compensation Committee, having served on that Committee from February 2003 to May 2011. From January 2004 to June 2016, Mr. Dolan served on the Nominating and Corporate Governance Committee, and as Chairperson from February 2005 to May 2015. Mr. Dolan is the Chairman and CEO of Cohere Technologies, a wireless communications and solutions company. He previously served as President, Chief Executive Officer and member of the Board of Directors of Sonus Networks, Inc., a supplier of voice, video and data infrastructure solutions for wireline and wireless telephone service providers, from October 2010 to December 2017. Until January 2008, Mr. Dolan served as Chief Executive Officer of QUALCOMM Flarion Technologies and Senior Vice President at QUALCOMM. Prior to that, Mr. Dolan had been Chairman and Chief Executive Officer of Flarion Technologies, Inc., a provider of mobile broadband communications systems, from May 2000 until its acquisition by QUALCOMM in January 2006. From 1996 until May 2000, Mr. Dolan was Chief Operating Officer of NextWave Telecom and prior to joining NextWave, he was Executive Vice President of Marketing for Bell Atlantic/NYNEX Mobile. Mr. Dolan served on the Board of Directors of NII Holdings, Inc. from July 2008 to May 2012. Mr. Dolan serves on the federal government's National Security Telecommunications Advisory Committee.

Kenneth R. Frank

Director

Mr. Frank has been a Director and member of the Audit Committee since January 2021. Mr. Frank is a Partner at Banneker Partners, a private equity firm focused in the enterprise software sector. He served as the Chief Executive Officer of Turning Technologies, an education technology company, from June 2019 to September 2021, and has led other enterprise software and services companies, such as Kibo Software, as Chief Executive Officer, from January 2016 to December 2018, and Aptean Software, as Chief Operating Officer, from October 2011 to December 2015. Prior to that, Mr. Frank was a member of the Executive Committee and held a series of leadership positions at Alcatel-Lucent, between February 2005 and October 2012, including Global President of Solutions and Marketing, President of the Professional Services Division and Chief Technology Officer of Alcatel North America. During his tenure with Alcatel-Lucent, he was also responsible for the joint engagement with Reliance Industries in Mumbai, India. Mr. Frank previously held positions at AT&T Bell Laboratories, BellSouth Telecommunications and venture-backed communications startups, Broadband Office and Masergy Communications. He currently serves on the Board of Directors of Orbcomm, Inc. and the Board of Councilors for the Marshall School of Business at the University of Southern California. He has previously served on the boards of industry organizations, including Alliance for Telecommunications Industry Solutions, the Telecommunications Management Forum and the USC Center for Telecommunications Management.

Robert D. Hormats

Director

Mr. Hormats has been a Director since October 2015. He was appointed to the Nominating and Corporate Governance Committee in February 2016 and in May 2021 he was appointed Chairperson. Mr. Hormats has served as Managing Director of Tiedemann Advisors since March 2020, following his five-year tenure as a member of Tiedemann's Investment Advisory Committee. He was a Vice Chairman of Kissinger Associates, Inc., a strategic international consulting firm, from 2013 to 2019. From 2009 to 2013, he served as Under Secretary of State for Economic Growth, Energy and the Environment. Prior to that, he was Vice Chairman, Goldman Sachs (International) and Managing Director of Goldman, Sachs & Co., which he joined in 1982. Mr. Hormats formerly served as Assistant Secretary of State for Economic and Business Affairs, Ambassador and Deputy U.S. Trade Representative and Senior Deputy Assistant Secretary for Economic and Business Affairs. He also formerly served as a senior staff member for International Economic Affairs on the National Security Council. Mr. Hormats is a member of the Council on Foreign Relations and served as a Director of Grace Therapeutics, LLC, a private biopharmaceutical company until December 2020. He has served on the Board of Visitors of the Fletcher School of Law and Diplomacy and the Dean's Council of the John F. Kennedy School of Government. He also formerly served as Director of Human Genome Sciences, Inc.

Grace D. Lieblein

Director

Ms. Lieblein was appointed as a Director in June 2017 and was appointed to the Compensation Committee in May 2021. From June 2017 to May 2021, Ms. Lieblein served on the Audit Committee. Ms. Lieblein most recently served as Vice President, Global Quality of General Motors Company (GM), a multinational corporation that designs, manufactures, markets and distributes vehicles, from November 2014 to December 2015. Ms. Lieblein joined GM in 1978 and has held a variety of leadership positions in engineering, supply chain management and international operations. Ms. Lieblein’s leadership positions have included serving as Vice President, Global Purchasing and Supply Chain from 2012 to 2014, GM Brazil President from 2011 to 2012, GM Mexico President from 2008 to 2011 and Vehicle Chief Engineer from 2004 to 2008. Ms. Lieblein is also a Director of Southwest Airlines Co. and Honeywell International, Inc.

Craig Macnab

Director

Mr. Macnab has been a Director since December 2014. In May 2018, Mr. Macnab was appointed to the Compensation Committee and in May 2019 he was appointed Chairperson. From December 2014 to December 2019, Mr. Macnab served on the Audit Committee. From February 2004 to April 2017, Mr. Macnab served as Chief Executive Officer of National Retail Properties, Inc., a publicly traded Real Estate Investment Trust (REIT), and served as Chairman of the Board from February 2008 to April 2017. Prior to joining National Properties, Mr. Macnab was the Chief Executive Officer, President and a Director of JDN Realty Corporation, also a publicly traded REIT, from April 2000 through March 2003. Mr. Macnab is currently a Director of VICI Properties, Inc. and previously served as a Director of DDR Corp. and Eclipsys Corporation. Mr. Macnab also currently serves on the Board of Directors and as Chair of the Governance Committee of the Cadillac Fairview Corporation Limited, a private company and a wholly owned subsidiary of the Ontario Teachers' Pension Plan.

JoAnn A. Reed

Director

Ms. Reed has been a Director since May 2007. In November 2007, Ms. Reed was appointed to the Audit Committee and in May 2015 she was appointed Chairperson. Ms. Reed is currently serving as a healthcare services consultant. Ms. Reed previously served as the Senior Vice President, Finance and Chief Financial Officer of Medco Health Solutions, Inc., a leading pharmacy benefit manager, until March 2008. Upon joining Medco in 1988, Ms. Reed served in finance and accounting roles of increasing responsibility and was appointed Senior Vice President, Finance in 1992 and Chief Financial Officer in 1996. Prior to joining Medco, Ms. Reed's experience included finance roles at Aetna/American Re-Insurance Co., CBS Inc., Standard and Poor's Corp. and Unisys/Timeplex Inc. Ms. Reed served on the board of directors of DynaVox until 2011 and on the board of directors of Health Management Associates, Inc. until 2014. Ms. Reed currently serves on the board of Mallinckrodt PLC. She also served as a Trustee for St. Mary's College of Notre Dame, Indiana until April 2015.

Pamela D. A. Reeve

Chair of the Board

Ms. Reeve has been a Director since March 2002 and was appointed as Chair of the Board in May 2020. She served as the Lead Director of the Board from May 2004 to May 2020. In May 2009, Ms. Reeve was reappointed to the Nominating and Corporate Governance Committee, having served on that Committee from August 2002 to February 2005. From April 2004 to June 2016, Ms. Reeve served on the Compensation Committee and served as its Chairperson from April 2004 to May 2009. Ms. Reeve also served on the Audit Committee from August 2002 to July 2007. From November 1989 to August 2004, Ms. Reeve was the President and Chief Executive Officer and a Director of Lightbridge, Inc., a global provider of mobile business solutions, offering products and services for the wireless communications industry. Prior to joining Lightbridge in 1989, Ms. Reeve spent 11 years as a consultant and in a series of executive positions at the Boston Consulting Group, Inc. Ms. Reeve previously served on the board of Frontier Communications Corporation from October 2010 to April 2021, including as the company’s Chairperson between April 2016 and April 2021, and served on the board of Sonus Networks, Inc. from August 2013 to May 2017.

Bruce L. Tanner

Director

Mr. Tanner has been a Director since September 2019 and was appointed to the Audit Committee in December 2019. Mr. Tanner served as Executive Vice President and Chief Financial Officer of Lockheed Martin Corporation from September 2007 until February 2019. Mr. Tanner joined Lockheed Martin in 1982 and, prior to being appointed Chief Financial Officer, held a variety of finance leadership positions at Lockheed Martin, including as Vice President of Finance and Business Operations, Lockheed Martin Aeronautics, from April 2006 to September 2007 and Vice President of Finance and Business Operations, Lockheed Martin Electronic Systems, from May 2002 to March 2006. Mr. Tanner is also a Director of Truist Financial Corporation (formerly SunTrust Banks, Inc.).

Samme L. Thompson

Director

Mr. Thompson has been a Director since August 2005 and was appointed to the Nominating and Corporate Governance Committee in May 2019. From May 2006 to May 2019, Mr. Thompson served on the Compensation Committee, and served as Chairperson of the Compensation Committee from May 2009 to May 2019. Mr. Thompson served as a Director of SpectraSite, Inc. from June 2004 until our merger with SpectraSite in August 2005. From 2002 to present, Mr. Thompson has served as the President of Telit Associates, Incorporated, a financial and strategic advisory firm. Mr. Thompson worked for Motorola, Inc. as Senior Vice President and Director, Strategy and Corporate Development from 1999 to 2002. Mr. Thompson also previously served as Director of Strategic Planning and Development with AT&T Information Systems, as Senior Vice President with Kidder, Peabody & Co. and as a strategy consultant with McKinsey & Company. Mr. Thompson served on the Board of Directors of Spok Holdings, Inc., formerly USA Mobility, Inc, from November 2004 to July 2020. He is a Trustee for the University of Chicago’s Marine Biological Laboratory.