Meet Our Leadership Team

David DeStefano has served as President and Chief Executive Officer since 2016, joined our board of directors in 2019, and was appointed Chairperson of our board of directors in 2020.

David previously served as Vice President, Chief Financial Officer, and Executive Vice President. Prior to joining the Company, he was Principal and Vice President at The Mid Atlantic Companies, Ltd.

David is also on the Advisory Board for Corporate Social Responsibility at the Satell Institute and the Board of Trustees of the Joseph Fund in Camden, New Jersey. He received a B.S. in Finance from Lehigh University.

As Chief Financial Officer, John is responsible for the development of company’s financial strategic objectives, mergers and acquisitions, and international strategies for expansion.

John has deep experience in leading global finance teams, developing multi-channel business models, and creating alternate investment strategies. Prior to joining Vertex, John was Chief Financial Officer at Flagship Credit Acceptance. John started his career in assurance services at Arthur Andersen.

He holds a B.S. in Accounting from LaSalle University and was a Certified Public Accountant.

As Chief Technology Officer, Sal leads the company’s technology strategy, software engineering and innovation roadmap to accelerate growth. 

He joined Vertex in 2021 after 30 years of technology and executive management expertise transforming and operating large-scale cloud software businesses. 

Sal spent his early career at IBM as a software engineer, architect and then in executive roles developing the company’s e-commerce and middleware products. He has also held Chief Technology Officer roles at Elastic Path Software, Business Objects and SAP. 

He holds a bachelor’s degree with honours in computer science from Western University.

As Chief Commercial Officer, Chris Jones is responsible for the strategy and execution of the organisation’s revenue generation operations. He leads the global sales, product, partnerships, consulting, and channel functions, and drives the go-to-market strategy to achieve the company’s targets.

Chris has served in various sales, marketing, and leadership positions in the two decades he’s been at Vertex including Vice President of Global Sales where he helped to build both an international and SaaS sales team while growing and leading the entire tax technology sales organisation.

Chris holds a B.S. in Marketing from Temple University.

As Chief People Officer, Ann Hollins drives the company’s people and culture strategy to accelerate business growth and achievement of our vision and mission. In her role, she is responsible for all aspects of the people and culture function globally, including talent management, total rewards, talent and leadership development, organizational development, culture and diversity, inclusion and belonging. Ann is an integral partner to executive leadership on innovative talent and organizational strategies to build an inclusive, engaging culture with empowered, high-performing teams globally in support of our growth aspirations.

Ann is a seasoned human resources executive with over 25 years of leading global, enterprise-wide HR strategies enabling business and organizational transformations across a wide range of industries, including healthcare, technology, energy, consumer packaged goods, information sciences and manufacturing. She has demonstrated expertise in the areas of organizational effectiveness, culture change, leadership development and strategic talent management.

Prior to joining Vertex, Ann held Chief People Officer roles at Zelis Healthcare, Volt Information Sciences and Weight Watchers and prior to that she held senior business unit and global center of excellence roles at Hess Corporation, Tyco, Dun & Bradstreet and PepsiCo.

Ann holds a B.B.A. in Industrial Relations/Human Resources from The University of Iowa, and an M.B.A. in Finance and Marketing from The Stern School of Business, New York University. She is Board Chair of the National Alopecia Areata Foundation and a member of the HR Policy Association. She lives in New Jersey with her husband and four young children.

As Chief Strategy Officer, Chirag Patel leads the strategy function responsible for driving global growth, focusing on acquisitions, strategic alliances, and engaging emerging businesses.

Chirag joins Vertex as a leader from EY Foundry, a corporate venturing unit responsible for building new software businesses in relevant markets. Prior to that position, he co-founded and acted as managing director at Highnote Foundry, a venture capital and venture development firm.

Throughout his career, he has held leadership positions at various prestigious organizations and established a successful track record for developing and executing growth strategies for both global 1,000 companies and startups.

Chirag holds a B.S. in computer science from Fairleigh Dickinson University. Currently, he is an adjunct professor at Carnegie Mellon University concentrating on corporate venturing.

As Senior Vice President of Customer Success and Services, Mindy Cunningham leads the company’s post-sales efforts with a focus on elevating the customers’ end-to-end journey.

Mindy is a seasoned and accomplished executive with an extensive career in customer success, professional services, consulting, and premium support services specializing in business transformation and innovative enabling technologies.

Prior to joining Vertex, Mindy held senior leadership positions with industry-leading companies including Thomson Reuters, Ellucian, Citrix Systems and KPMG Consulting. She spent the early part of her career as a certified public accountant with Ernst & Young.

Mindy is a founding member of CHIEF Miami, a private network built to drive more women in positions of leadership, and served as a board member on the Technology Services Industry Association (TSIA) Customer Success Advisory Board. She holds a B.S. in Accounting from American University.

Carlo Cautilli is the Senior Vice President of Sales at Vertex, where he oversees the direct sales, presales, and inside sales teams.

Before joining Vertex, Carlo led the global indirect tax department at Thomson Reuters. Prior to that, he held various sales and management roles at Sabrix until its acquisition by Thomson Reuters. Carlo's career also includes positions at enterprise software and services organizations such as Vignette, Neogent, Deloitte and PwC.

Carlo brings extensive experience in driving top-line growth, increasing sales, expanding the customer base and maximizing revenue from existing customers.

He holds a B.A. in Business Administration from Boston College and resides in Boston, MA, with his family.

Bryan Rowland is Senior Vice President, General Counsel, and Corporate Secretary responsible for all general corporate, information security, and transactional matters. In addition, he is responsible for corporate governance and advises leadership on critical business priorities including privacy, business strategy, and potential new markets.

Bryan possesses a deep knowledge of business operations, security, and compliance in technology and the software industry. Previously he was Senior Vice President, General Counsel, Chief Compliance Officer, and Corporate Secretary at Checkpoint Systems, Inc.

Bryan holds a J.D. from Villanova University Charles Widger School of Law and a B.A. in Psychology and Philosophy from Towson University.

As Chief Operations Officer, Steve Hinckley is responsible for managing operations to achieve business goals, promote growth, and execute the company’s strategic vision leading the areas of Corporate IT, Tax Research, and the Customer Center of Excellence (COE).

Steve has more than 25 years of executive leadership in the creation of global supply chain strategy, enterprise resource planning platforms, corporate operations, and client delivery management.

Prior to joining Vertex, Steve held various leadership positions with IBM Global Business Services and the PricewaterhouseCoopers (PwC) Consulting Practice where he was a Partner in the Supply Chain & SAP Practice.

He holds a B.S. in Finance from the University of Maryland.

Jeff Foucher is Chief Marketing Officer responsible for leading all corporate brand, communications, product marketing, and demand generation teams. His passion for combining artful storytelling and data-driven marketing have accelerated the company’s go-to-market expansion and transformational growth.

Previously, he held senior leadership positions in corporate, product and field marketing at CA Technologies (now Broadcom). Earlier in his career, Jeff honed his marketing chops with AT&T and at advertising agencies Y&R and McCann-Erickson where his client roster included IBM, AT&T and General Motors.

Jeff holds a B.A. in Communications from the University of Michigan.

Ben Askin is Chief Information Officer, responsible for enterprise technology strategy, security, data analytics, and digital transformation, using cognitive solutions and data insights across the organisation to advance the delivery of value to customers.

Ben has more than 25 years of consulting and organisational management experience with small to large enterprise-sized clients in a variety of leading industries, primarily involving business innovation, strategy, and large-scale technology enablement.

Ben earned a B.S. in Business and Finance from the University of Maryland College Park and is also the founder of the Heroes Youth Baseball and Basketball Club, dedicated to the development of well-rounded youth through positive sports competition.

Ryan Leib became Chief Accounting Officer in 2024. In this position, he leads Vertex’s accounting operations and policies, ensures the certification of the company’s financial filings with the U.S. Securities and Exchange Commission and directs compliance with the Sarbanes-Oxley Act (SOX). He also serves as the primary liaison with Vertex’s Audit Committee.    

His expertise is in corporate finance and accounting. Prior to joining Vertex, Ryan’s most recent role was Vice President of M&A and Portfolio Transformation in the Corporate Development group at Trinseo PLC. Previously, he also held roles as their Vice President, Chief Accounting Officer and Vice President, Treasurer. Additionally, over a 13-year tenure at PricewaterhouseCoopers LLP (PwC), he provided auditing services for large multinational public companies and technical guidance for client companies on complex accounting issues in the business combinations and stock-based compensation areas.  

Ryan is a Certified Public Accountant and a member of both the American Institute of Certified Public Accountants and the Pennsylvania Institute of Certified Public Accountants. He received his B.S. in Accounting from Saint Joseph’s University. 

As Senior Vice President of Product Management, Uwe Sydon is responsible for driving the product vision for the company, including a strategic, global product portfolio, as well as line of business management.

Uwe has over 22 years of technology experience growing multibillion-dollar global product portfolios and platforms in the consumer and business markets.

Before joining Vertex, he was Senior Vice President and Chief Innovation Officer at Checkpoint Systems, Inc. and held executive leadership roles at Blackberry, Nokia Siemens Networks, and Siemens AG, Mobile Devices. Uwe has worked and lived in many locations across the globe, including Germany, where he was born, as well as Canada, Switzerland, and the U.S.

Uwe holds over 30 patents and was awarded Inventor of the year from Siemens AG in 1998. He received his Diplom Ingenieur at the University of Wuppertal, Germany in Electrical and Electronics Engineering.

As Senior Vice President of Software Engineering, Brad Cameron leads Vertex’s global engineering team and provides strategic technical direction to build innovative solutions that solve complex problems and provide a delightful experience and expansive customer value.

Brad has been leading product engineering teams for more than 25 years in both startups and large enterprises. He is experienced in the design and delivery of high scale and highly available solutions from hard real-time telecommunications systems, to scaled enterprise applications and cloud-based SaaS infrastructure.

Prior to joining Vertex, Brad was Vice President of Engineering at Salesforce and held executive engineering positions at Oracle Corporation, Dilithium Networks and Sonim Technologies.

Brad holds a B.Eng. in Computer Systems from Carleton University in Ottawa, Canada. He serves as an Advisory Board member for the Marketing and International Business program at UNLV Lee Business School.

Nigel Rughani is Vice President of Corporate Development. He is responsible for identifying, evaluating, and executing growth opportunities for Vertex through partnerships, acquisitions, joint ventures, and strategic investments globally. Nigel has extensive experience in M&A including management of all phases of analysis, due diligence, and transaction structuring.

Prior to joining Vertex, Nigel led M&A activities at AmeriHealth, a national health insurer based in Philadelphia. He began his career in the Investment Banking department at Jefferies, and later in the M&A department at SunTrust Robinson Humphrey.

Nigel holds a Bachelor’s degree in Economics from Harvard University.

Ric Andersen joined our board of directors in January 2008 and currently serves as lead director. He has over 25 years of consulting and management experience at IBM, Price Waterhouse and PwC Consulting. His last 15 years have been spent in private equity. He is currently a managing partner at Peak Equity (‘‘Peak’’), a Philadelphia-based private equity firm focused on lower middle-market enterprise software. Prior to joining Peak, Mr. Andersen was a partner at Milestone Partners, a Philadelphia-based private equity firm and he was a managing director at Silver Lake Partners, a technology-focused private equity firm based in New York. During his tenures with Price Waterhouse, PwC Consulting, and IBM, Mr. Andersen was a senior partner and senior executive leading several businesses in the United States and Asia as well as globally. Mr. Andersen is currently chairman of G5, a privately held software company. In addition, he serves on the Board of American Public Education Inc. (‘‘APEI’’) a publicly traded online higher education company where he is chair of the compensation committee and a member of the audit committee. Mr. Andersen holds an MBA from the Wharton School at the University of Pennsylvania and a BS from Bucknell University.

Bradley Gayton joined our Board in 2021. Mr. Gayton previously served as the Senior Vice President, General Counsel of the Coca-Cola Company. Prior to joining The Coca-Cola Company, Mr. Gayton spent 29 years in various leadership positions at Ford Motor Company and most recently as Group Vice President, Chief Administrative Officer and General Counsel. Mr. Gayton has deep experience in law, governance, tax and technology. He brings a global perspective in terms of the tax obligations for multinational enterprises and has experience in developing solutions through organizational innovation. While at Ford, he led explorations to see how artificial intelligence could be used for different business applications and collaborated with Vertex on the company’s tax compliance solutions worldwide. Mr. Gayton has a BS in Business Administration from the State University of New York at Buffalo, School of Management in 1986 and a JD from the State University of New York at Buffalo, Law School.

Mark J. Mendola joined our Board in June 2025. Mr. Mendola was previously the US Vice Chair and Managing Partner, US Leadership Team, at PwC from 2016 until 2024. During his tenure he grew revenue significantly and drove profitability and share value to record levels through the transformation to digital and global delivery. Mr. Mendola led PwC’s businesses, developed and executed firmwide growth strategies, and led PwC’s efforts to transform business models and service offerings through technology and had overall responsibility for the firm’s people and digital transformation strategies. Mr. Mendola also held the position of PwC US Tax Leader, US Leadership Team, Global Tax Leadership Team from 2011 – 2016, PwC US Tax Managing Partner from 2009 – 2011, PwC Leader, Canadian Tax Practice from 2007 – 2009, and PwC Office Managing Partner, Detroit, US Automotive Sector Leader and Global Tax Automotive Sector Leader from 2003 – 2007. Mr. Mendola is a member of the Detroit Economic Club Board of Directors and Oakland University, School of Business Administration Board of Visitors (Emeritus). Mr. Mendola received an MBA from the University of Notre Dame, and a BA in Accounting from Oakland University.

Philip Saunders joined our Board in June 2022. Mr. Saunders is the Chief Executive Officer of Relativity since December 2022. He was recently the Chief Executive Officer and member of the Board of Directors of Cornerstone On Demand, a market leading talent management Software as a Service (SaaS) company. Mr. Saunders successfully implemented a company transformation initiative resulting in a return to growth, expansion of profitability, and increased customer retention. Mr. Saunders ultimately executed a successful sales process of the company via a public-to-private transaction in October 2021 with the acquisition by Clearlake Capital. This followed Cornerstone’s acquisition in April 2020 of Saba Software, Inc., where Mr. Saunders was a member of Saba’s board of directors and where he served as Chief Executive Officer was responsible for leading the transformation of the business, executed on multiple acquisitions, and accelerated growth and EBITDA expansion. Prior to joining Saba in 2015, Mr. Saunders was President and a member of the board of directors of SafeNet, Inc. (acquired by Gemalto N.V). Mr. Saunders holds an MBA with an International Finance concentration from Seton Hall University’s W. Paul Stillman School of Business. Mr. Saunders has been recognized by Comparably as one of the top 100 Best CEO’s in 2021.

J. Richard Stamm joined our board of directors in January 2019. Prior to joining our board of directors, Mr. Stamm was a partner with PwC for 30 years, during which time he served a long list of domestic and international clients and held numerous leadership positions. Over the final 12 years of his career with PwC, Mr. Stamm was the firm’s Vice Chairman and U.S. Tax Leader, and then progressed to PwC’s Vice Chairman of Global Tax. Mr. Stamm is Vice President and Chief Financial Officer of Stamm Development Group LLC, a Philadelphia area real-estate developer. Mr. Stamm is a member emeritus of the Board of Advisors for the Leventhal School of Accounting at the University of Southern California and was formerly a member of the Boards of Germantown Academy and Lycoming College. Mr. Stamm received a BA in Accounting from Lycoming College.

Amanda Westphal Radcliffe has served on our board of directors since 1993. Prior to joining our board of directors, Ms. Radcliffe served in a variety of roles at the Company, from technical software instructor and production, to middle-market product teams. Prior to joining the Company, she was a middle-market Managing Director at a global corporate travel management company. Ms. Radcliffe serves on the Children’s Hospital of Philadelphia Board of Trustees, Foundation Board of Overseers and the St. Joe’s University Kinney Center for Autism Education and Support Advisory Board. Ms. Radcliffe is Chair of the Drexel University A.J. Drexel Autism Institute Board and Chair Emeritus of breastcancer.org. Ms. Radcliffe is also a member of the Philadelphia Chapter of Women Corporate Directors. Ms. Radcliffe holds a BA from Moravian College, attended business school at Drexel University and attended the Executive Education program at the Wharton School.

Stefanie Westphal Thompson joined the Company in 1991 and has served in a variety of roles, including Treasurer. Prior to joining the Company, Ms. Thompson was a Vice President at Chemical Bank (now part of Chase), where she specialised in managing the banking relationship for middle market companies. Ms. Thompson sat on Bryn Mawr Hospital’s Foundation Board for eight years, serving as Head of their Trustee Committee and as Vice-Chair. Ms. Thompson also served on the Board of the Agnes Irwin School in Rosemont, Pennsylvania, for ten years, heading its Trustees Committee. Ms. Thompson received an MBA in Finance from Fordham University and has a dual BA in Engineering and Economics from Lafayette College.