Board of Directors

Gordon Nixon joined the Board of Fiserv, Inc. as its Chairman in January 2026. Mr. Nixon was president, chief executive officer, and a director of Royal Bank of Canada from 2001 to 2014. Prior to his appointment as chief executive officer of RBC, Mr. Nixon was chief executive officer of RBC Capital Markets where he had held a variety of roles including group head corporate and investment banking. Mr. Nixon joined RBC through the acquisition of Dominion Securities where he was head of investment banking and a member of its executive committee. As an investment banker, Mr. Nixon advised numerous corporations and also spent time in global trading and managed the firm’s operations in Japan.

Mr. Nixon has been chairman of the board of Bell Canada since 2016 and a board member since 2014; he will not stand for reelection in 2026. He is a director and chair of the Corporate Governance Committee at Blackrock and Lead Director at George Weston Limited. He is also on the advisory board of Kingsett Capital. Mr. Nixon has served on the board of numerous charitable and public service organizations and is Director Emeritus at the Art Gallery of Ontario and an honorary board member of the Hospital for Sick Children. He attended Queen’s University where he graduated with an honours Bachelor of Commerce degree and was awarded an honorary Doctor of Law.

Henrique De Castro joined the Board of Fiserv, Inc. in 2019 after serving on the First Data board since 2017. Mr. De Castro is a director of Banco Santander S.A. and previously served on the board of directors of Target Corporation from 2015 to 2019. Mr. DeCastro led Cantor Fitzgerald’s venture capital arm, Cantor Ventures, and served as chief operating officer at Yahoo! Inc. between 2012 and 2014. Prior to Yahoo!, Mr. De Castro held senior executive positions at Google including president of partner business and President of Media, Mobile & Platforms where he built and scaled the business globally to over 50 countries. Mr. De Castro also held senior executive roles at Dell Technologies and McKinsey & Company and has extensive experience across the globe in the technology, internet, media and retail industries. He holds an MBA from IMD in Switzerland and a bachelor’s degree in business and economics from ISEG in Lisbon.

Stephanie Cohen joined the Board of Fiserv, Inc. in 2025. Since 2024, she has serveed as chief strategy officer of Cloudflare Inc., where she leads corporate infrastructure and network strategy and drives initiatives in network expansion, artificial intelligence, and the developer platform. Before joining Cloudflare, Ms. Cohen was a member of the management committee at Goldman Sachs from 1999 to 2024, holding roles that included global head of platform solutions, global co-head of consumer and wealth management, head of financial sponsors mergers and acquisitions, and chief strategy officer. She serves on the board of Trustees of the Economic Club of New York and on the board of directors of Quill.org.

Harry DiSimone joined the Board of Fiserv, Inc. in 2018. Mr. DiSimone founded and served as president of Commerce Advisors, Inc., a consulting and advisory services firm for the retail financial services and payments industries and served as its president from 2008 to 2020. From 2010 to 2015, Mr. DiSimone was co-managing partner of Encore Financial Partners, Inc., a company focused on the acquisition and management of banking organizations in the United States, which Mr. DiSimone also co-founded. Prior to 2008, Mr. DiSimone spent over 30 years at J.P. Morgan Chase & Company and its predecessor organizations in senior roles, including executive vice president and chief operating officer of the Chase credit card business; Private Label Card and merchant processing executive; retail bank chief marketing officer; consumer banking, investments and insurance executive; and Chase personal financial services executive.

Mr. DiSimone previously served as a director at Reliant Funding, Inc., a privately held provider of short-term small business loans, and ClearBalance Inc., a privately held provider of patient loan programs to hospitals and health care systems nationwide. He has also advised a number of retail banking and payment organizations, including The Direct Marketing Association (now known as The Data & Marketing Association), the NYCE Payment Network, Chase Paymentech, MasterCard’s U.S. Business Committee, Visa Global Advisors, the New York Clearing House’s Strategic Planning Committee and the Federal Reserve Bank’s Payment Card Council.

Céline Dufétel joined the Board of Fiserv, Inc. in January 2026. She has served as Chief Financial Officer at Bridgewater Associates, LP, since 2025. From 2021 to 2024, Ms. Dufétel held roles at Checkout.com from 2021 to 2024, most recently serving as president. She served as chief financial officer at T. Rowe Price from 2017 to 2021, and also served as chief financial officer and chief operating officer in 2021. Ms. Dufétel began her career at McKinsey, where she led the North American Asset Management practice.

Lance Fritz joined the Board of Fiserv, Inc. in February 2024. He served as chairman, president, and chief executive officer of Union Pacific from 2015 until his retirement in 2023 after 23 years of service. Mr. Fritz joined Union Pacific in 2000 as vice president and general manager of marketing and sales and served in various executive positions including in operations, labor relations, and as president and chief operating officer of Union Pacific Railroad. Before joining Union Pacific, Mr. Fritz worked for Fiskars Inc., Cooper Industries, and General Electric. He earned a bachelor’s degree from Bucknell University and a master’s degree in management from the Kellogg School of Management at Northwestern University. Mr. Fritz serves on the board of directors of Parker-Hannifin Corporation and is a member of The Business Council. Fritz is deeply involved with community organizations in his hometown of Omaha, Nebraska.

Ajei Gopal joined the Board of Fiserv, Inc. as a Director in 2024. Mr. Gopal serves as chief executive officer and a member of the board of directors of Procore Technologies, Inc., a global provider of cloud-based construction management software. He joined Procore in September 2025 as chief executive officer designate and board member and became chief executive officer in November 2025. Mr. Gopal previously served as director and president and chief executive officer of ANSYS, Inc., an engineering simulation solution provider, until its acquisition by Synopsys, Inc. in 2025, after which joined its board of directors. Previously, Gopal was an operating partner for Silver Lake Partners, senior vice president and general manager of Hewlett Packard Software, an executive vice president at CA Technologies, an executive vice president and chief technology officer at Symantec, and the founder and chief executive officer of ReefEdge Networks. Mr. Gopal served on the board of ANSYS, Inc. from 2011 to 2025 and was a director of Citrix Systems from 2017 to 2021.

Mike Lyons joined Fiserv in 2025 as president and CEO-elect and assumed the role of chief executive officer and member of the Board in May 2025. Prior to joining the company, Mr. Lyons served as president of The PNC Financial Services Group where he led PNC’s lines of business. Prior to his role as president, he served as head of Corporate & Institutional Banking at PNC where he played a significant role in building PNC’s national franchise.

Before joining PNC, Mr. Lyons held various leadership roles at Bank of America. As global head of corporate development and strategic planning, Lyons helped drive the bank’s growth strategy. Additionally, he led mergers and acquisitions in the private equity business and investor relations. Before Bank of America, he served as portfolio manager at Maverick Capital where he invested in financial institutions globally.

Mr. Lyons is a national trustee of the Boys & Girls Clubs of America, a member of the board of directors at University of Pittsburgh Medical Center, and board chair for the Pittsburgh Parks Conservancy. Lyons served as chair of the board of directors of Early Warning Services, LLC, the owner, and operator of Zelle and PAZE. Lyons graduated from the University of Pennsylvania.

Wafaa Mamilli joined the Board of Fiserv, Inc. in 2021. She serves as executive vice president and chief digital and technology officer of Roche, a biotechnology, pharmaceutical and diagnostics company. Prior to Roche, Ms. Mamilli served as executive vice president, chief digital & technology officer and group president for China, Brazil and Precision Animal Health of Zoetis Inc. and led global technology, digital, analytics and cybersecurity teams powering business innovation, growth, and customer experiences. Ms. Mamilli joined Zoetis from Eli Lilly and Company, where she spent more than 20 years in a variety of leadership positions, including chief information officer of the global business units. She served as Eli Lilly’s first chief information security officer leading strategy and execution to secure digital products, devices, manufacturing systems and information across the business.

Gary Shedlin joined the Board of Fiserv, Inc. in January 2026. He has been a Vice Chairman of BlackRock, Inc. since 2023 and is a member of the Global Executive Committee. Mr. Shedlin previously served as BlackRock’s chief financial officer from 2013 to 2023. Prior to joining BlackRock, he was vice chairman, Investment Banking, and a managing director in the Financial Institutions Group at Morgan Stanley. Prior to his time at Morgan Stanley, Mr. Shedlin was chairman of Citi's Financial Institutions Group and a managing director and co-head of the Financial Institutions Group at Lazard

Charlotte Yarkoni joined the Board of Fiserv, Inc. in 2023. She also serves as a member of the board of directors TransUnion, a global information and insights company. Ms. Yarkoni most recently served as president of Commerce + Ecosystems at Microsoft from 2022 until 2025, and previously held roles as vice president and chief operating officer, Cloud and AI of Microsoft from 2021 to 2022, and vice president, Commerce and Ecosystems of Microsoft from 2016 to 2021. Prior to joining Microsoft, Ms. Yarkoni was President of Telstra Software Group, a strategic growth division focused on new global software businesses and capabilities in markets experiencing digital disruption adjacent to Telstra’s core telecommunications industry. She has also held senior vice president positions at EMC and VMware and worked at AT&T, IBM and Accenture.

Ms. Yarkoni earned a bachelor’s degree in management science from Georgia Institute of Technology and previously served as vice chairman at Oyola and as a board director of the Seattle Humane Society.