EXECUTIVE LEADERSHIP TEAM
President & CEO
President & CEOWith ACI Worldwide, Inc. since 2020
Mr. Almeida was appointed ACI’s president, chief executive officer and member of the Board of Directors in March 2020. Mr. Almeida is a seasoned executive with senior leadership experience spanning multiple industries and countries, two decades of payments experience and a strong track record of growth acceleration and value creation.
Prior to joining ACI, Mr. Almeida most recently served as an operating partner at Advent International, one of the world’s largest private equity funds, supporting business development at the fund’s portfolio companies, with a particular focus on growth initiatives that support higher sales and earnings.
During his 17-year tenure at The Western Union Company, Mr. Almeida advanced through a series of general management roles of increasing responsibility. He last served as president of Global Money Transfer. In this role, Almeida led Western Union’s $5 billion consumer business across more than 200 countries and was integral to proactively expanding the company’s digital footprint and growing digital revenues meaningfully and profitably while positioning the company as a global digital leader in money transfer.
Mr. Almeida is fluent in English, Spanish and Portuguese. He serves on the Board of Millicom International Cellular S.A. and is a member of the Compliance and Business Conduct Committee. Mr. Almeida holds a bachelor’s degree in Civil Engineering from Centro Universitário Instituto Mauá de Tecnologia in São Paulo and a Master of Business Administration from Fundação Getulio Vargas in São Paulo. He extended his education at Harvard Business School, The Wharton School and the International Institute of Management (IMD).
Chief Revenue Officer
Chief Revenue OfficerWith ACI Worldwide, Inc. since 2016
Eve Aretakis is ACI’s chief revenue officer. In this role, she leads ACI’s commercial organization, which is focused on driving organic growth globally through sales effectiveness, a targeted go-to-market strategy and superior customer service.
Since joining ACI in 2016, Ms. Aretakis has held a number of executive leadership roles at the company. Most recently, she served as group president of our billers & merchants P&L and was responsible for driving growth and delivering market-leading value to customers through payment solutions deployed in our data center or in the public cloud. Previously, Ms. Aretakis led product development & delivery for ACI, overseeing software engineering, software product management and architecture for our product portfolio.
Prior to joining ACI, Ms. Aretakis served as executive vice president at Unify/Siemens Enterprise Communications, where her responsibilities included P&L management and accountability for software development, product management and manufacturing. She also served as president of IP network solutions at Siemens, unit president of the company’s U.S. carrier division and as executive vice president at Unisphere Networks. She began her career as a software engineer for Texas Instruments and Raytheon.
Ms. Aretakis holds her bachelor’s degree in computer science and economics from Union College.Director Since
Chief Financial Officer
Chief Financial OfficerWith ACI Worldwide, Inc. since 2007
As ACI’s chief financial officer, Scott Behrens is responsible for the company’s global financial activities, including reporting, investments and capital structure.
Prior to joining ACI in 2007, Mr. Behrens served as senior vice president, corporate controller and chief accounting officer at SITEL Corporation from January 2005 to June 2007. Earlier in his career, he served as vice president of Financial Reporting at SITEL Corporation and as a senior manager at Deloitte & Touche, LLP.
Mr. Behrens holds a Bachelor of Science from the University of Nebraska – Lincoln.Director Since
Chief Strategy Officer
Chief Strategy OfficerWith ACI Worldwide, Inc. since 2012
Mike Braatz oversees corporate strategy and corporate marketing for ACI. Since joining ACI in 2012, Mr. Braatz has held a number of senior product management and operating roles. Most recently, he served as chief product officer responsible for product strategy, product management and product development. He previously served as senior vice president and P&L leader for ACI On Demand and product line manager for ACI’s fraud and risk management solutions.
Prior to joining ACI, Mr. Braatz served as senior vice president at Memento Inc., a provider of fraud management solutions, acquired by FIS in 2012. Earlier in his career, he was a strategy consultant for Bain & Company and before that an officer in the U.S. Air Force.
Mr. Braatz earned a Bachelor of Arts from Northwestern University and an MBA from Northwestern's Kellogg School of Management.
Chief Legal Officer
Chief Legal OfficerWith ACI Worldwide, Inc. since 2003
Dennis Byrnes is ACI’s Chief Legal Officer. He serves on the executive team and oversees all legal matters.
Prior to joining ACI in 2003, Mr. Byrnes was an attorney in Bank One's technology group from 2002 to 2003 and before that with Sterling Commerce, an electronic commerce software and services provider, from 1996. He began his legal career with Baker & Hostetler, serving as an attorney in that firm from 1991 to 1996.
Mr. Byrnes holds a JD from The Ohio State University College of Law, an MBA from Xavier University and a Bachelor of Science in engineering from Case Western Reserve University.Director Since
Chief Human Resources Officer
Chief Human Resources OfficerWith ACI Worldwide, Inc. since 2020
With more than three decades of leadership experience in human resources, talent and development, Mr. Dinkins serves as ACI’s chief human resources officer. In his role, he leads the company’s global HR team and talent strategy.
Mr. Dinkins previously served as chief human resources officer at Fiesta Restaurant Group, which operates leading U.S.-based restaurant brands, employing more than 12,000 team members. Prior to Fiesta, he served as senior vice president of human resources at Cable & Wireless Communications, a leading telecommunications company with more than 7,000 employees across 26 countries. He also held senior HR roles at global organizations including Citrix Systems, AVAYA and Lucent Technologies.
He earned a Bachelor of Science in Industrial & Labor Relations from Cornell University and an MBA from Columbia University.Director Since
Chief Risk & Administrative Officer
Chief Risk & Administrative OfficerWith ACI Worldwide, Inc. since 2007
Carolyn Homberger leads the risk, information technology and administrative functions for ACI. In her risk role, she drives global risk management strategy including information security, compliance, enterprise risk management and business continuity. In her administrative role, she establishes strategic goals and provides oversight for the company’s information technology, facilities and procurement functions.
Prior to becoming chief risk & administrative officer, Ms. Homberger held a number of senior and operational leadership positions at ACI, including leading global sales, ACI On Demand (the company’s SaaS and Platform business) and customer management and maintenance. She joined ACI in 2006 from GE Healthcare, where she held finance leadership roles and completed the Financial Management Program (FMP).
Ms. Homberger is a board member of the American Transaction Processors Coalition (ATPC) and Women in Payments. She is also very active in her local community. She is Six Sigma Green Belt Certified and holds her MBA from Fordham University and a Bachelor of Science from Miami University.Director Since
Chief Development Officer
Chief Development OfficerWith ACI Worldwide, Inc. since 2006
Craig Maki is responsible for the global corporate development and treasury activities at ACI. Prior to joining the company in 2006, Mr. Maki served as senior vice president for Stephens Inc. from 1998 through May 2006. Earlier in his career, he worked in the corporate finance group at Arthur Andersen and at Andersen Consulting.
Mr. Maki holds his MBA from the University of Denver and his Bachelor of Science degree from the University of Wyoming.Director Since
Chief Transformation Officer
Chief Transformation OfficerWith ACI Worldwide, Inc. since 2018
Johan Roets is ACI’s chief transformation officer. In this role, he orchestrates important change initiatives for the organization. He sets the course and tone for transformation and makes sure change is embedded in our people, processes and culture.
Mr. Roets joined ACI in 2018, serving as chief of staff to the CEO and head of shared services. He spent 11 years with the Standard Bank Group in various leadership roles in payments and retail banking. Earlier in his career, he was a partner with Arthur Andersen & Co. and led the company’s Africa practice in cybersecurity consulting.
He earned a Bachelor of Commerce degree from North West University in South Africa and is a Chartered Accountant (South Africa).Director Since
Interim Chief Technology Officer
Interim Chief Technology OfficerWith ACI Worldwide, Inc. since 2012
Raj Vaidyanathan is ACI’s interim chief technology officer. In this role, he leads ACI’s technology & operations organization, which is focused on developing and running our world-class payments software products.
Mr. Vaidyanathan joined ACI in 2012 with our acquisition of S1. He has held a number of senior leadership roles in our technology & operations organization, most recently as head of merchant & fraud product development. He previously served as head of product development for our billers segment. Earlier in his career, he served as vice president of product development, director of professional services and lead architect at S1. He has also held key development roles at AT&T and NIIT.
Mr. Vaidyanathan holds a Bachelor of Engineering degree in computer science from Karnatak University in India and an MBA in international business from Georgia State University.Director Since
Chief Product Officer
Chief Product OfficerWith ACI Worldwide, Inc. since 1999
Jeremy Wilmot is ACI’s chief product officer. In this role, he leads ACI’s product management organization, which is focused on strategically deploying our world-class products to maximize growth and profitability. He is well versed in ACI’s unique product portfolio and uses that knowledge to ensure our products are best addressing the needs of the market and the needs of the customers in our three core segments—banks & financial intermediaries, merchants and billers.
Mr. Wilmot joined ACI in 1999 and has held a number of executive and senior leadership roles at the company. Most recently, he served as group president of our banks & intermediaries P&L and was responsible for delivering market leading value to banks and payment intermediaries around the world. Previously, Mr. Wilmot was ACI’s chief marketing and revenue officer, managing director for the Americas and president for Asia-Pacific. He began his career at ACI as regional director for Western Europe and Africa. Prior to joining ACI, Mr. Wilmot worked for ICL (now Fujitsu) in several capacities, including as international sales manager for financial services.
Mr. Wilmot is a member of the board of Mindgate Solutions and holds a Bachelor of Arts degree in Business Studies from Oxford Brookes University in the U.K. He has completed the Advanced Management Program at INSEAD in France.Director Since