TwitterLinkedInFacebook skip to content
Person framing the sun with their hands forming a rectangle against a bright, hazy sky backdrop.

Get to know us

Meet our Executive Leadership Team, the people reimagining how businesses work.

Executive Leadership

Image / Leadership / Andrew Davies

Chief Executive Officer

Andrew Davies

Before joining Syniverse as CFAO in June 2020, Andrew Davies served as the CFO of Sprint Corporation from July 2018 until the closing of its merger with T-Mobile USA. Before that, he spent four years serving as Group CFO for Amsterdam-based VEON. Prior to joining VEON, Mr. Davies spent more than a decade with Vodafone Group holding CFO positions in Japan, Turkey, and India, before being named CFO of Verizon Wireless in the U.S., which at the time was a joint venture between Vodafone and Verizon Communications. He started his career with KPMG in Wales before serving in senior finance roles with GE, Honeywell, and the Caudwell Group in both the U.K. and the U.S. Mr. Davies graduated with an honors degree in mathematics from London’s Imperial College of Science, Technology and Medicine, is an Associate of the Royal College of Science, and is a Fellow of the Institute of Chartered Accountants in England and Wales. He serves on the CTIA Board of Directors. Additionally, Mr. Davies is a Wall Street Journal CEO Council member.

Bob Chiodo

EVP and Chief Revenue Officer

Bob Chiodo

With more than three decades in the industry, Bob is a results-driven senior sales leader with a proven track record of accelerating revenue growth, building high-performing teams, and executing strategic sales initiatives. Bob leads Syniverse’s go-to-market strategy across all verticals and segments, including the public sector. Bob oversees sales, marketing, customer success, pre-sales, professional services, and business development.

Since joining Syniverse in 2019 to lead North American sales, Bob has played a pivotal role in driving growth. He was promoted to Senior Vice President (SVP) in 2022. As SVP of Americas, he oversaw sales and client experience teams serving mobile network operators and enterprise customers across North and South America. Under his leadership, his team consistently developed and implemented growth-focused go-to-market strategies that align with customer needs, while optimizing internal operations to enhance the customer experience.

Before Syniverse, he held multiple leadership roles at CenturyLink (now Lumen) and AT&T, where his extensive experience in operations, sales, and sales engineering led to progressive growth.

Leadership / Mark Maddry

EVP and Chief Financial Officer (CFO)

Mark Maddry

Mark Maddry brings 25 years of experience driving financial strategy in the telecommunications industry. At Syniverse, as EVP and CFO, he oversees global financial operations, including financial planning, reporting processes, and investor relations. Mark has been an integral part of the Syniverse leadership team since 2022, when he joined as Senior Vice President of Business Performance. During his tenure, he has been instrumental in strengthening investor confidence and driving financial excellence, while also extending his leadership to further strengthen Syniverse's finance organization.

Before joining Syniverse, Mark had a distinguished career at Sprint/T-Mobile, where he held progressively senior roles over more than two decades. In his prior role, Mark was Sprint’s Vice President of Planning and Analysis, playing a pivotal role in orchestrating the financial integration of the $26 billion merger between Sprint and T-Mobile. Mark also led transformative initiatives, long-term financial strategy, and process and system optimization. He also managed critical communications with the board and investor relations, steering strategic financial messaging to key stakeholders.

Mark holds a Master of Science degree from the University of Memphis and a Bachelor of Science degree from Western Carolina University.

Bill-Petersen-Headshot

EVP and Chief Legal Officer

William B. Petersen

Bill oversees Syniverse’s legal, corporate governance, and information security functions, bringing over 35 years of extensive legal, strategic governance, and operations experience.

During his career, Bill has served as an Assistant United States Attorney, the General Counsel of Verizon Wireless, the head of litigation and enforcement for Verizon Communications, and the General Counsel and Chief Operating Officer for the Philadelphia Museum of Art. He has also been an adjunct professor at the University of Pennsylvania Carey Law School.

Bill is a graduate of the University of Pennsylvania Carey Law School, where he served as the Editor-in-Chief of the University of Pennsylvania Law Review. He also holds an M. Div. from Yale University and B.A. from Ursinus College.

Leigh Ann Polverelli

EVP and Chief Customer and Operations Officer

Leigh Ann Polverelli

Leigh Ann Polverelli oversees Syniverse’s global customer support and operations, which is structured to exceed customers’ service needs with 24/7 support through in-region technical expertise, standardized solutions, and broad knowledge of business needs in each market served by Syniverse. With more than 30 years of experience in the telecom industry, Ms. Polverelli’s career has encompassed several senior customer support and operations positions over 19 years at Syniverse. She holds a bachelor’s degree in business administration from the University of Massachusetts at Lowell and an MBA from Simmons College.

Sandra Rosa

EVP and Chief Human Resources Officer

Sandra Rosa

Sandra Rosa serves as the Chief Human Resources Officer, where she leads the company’s global People and Culture strategy, partnering closely with the CEO and executive leadership team to drive business performance through talent, culture, and organizational effectiveness.

In this role, Sandra oversees the full spectrum of the people function, including talent acquisition, total rewards, HR operations, and talent development. She is also responsible for the company’s communications and brand functions, bringing a unique, integrated approach to aligning brand, culture, and the employee experience. Her leadership is focused on building a connected, high-performing culture that enables innovation, strengthens engagement, and advances the company’s growth.

Sandra is known for her ability to translate business strategy into people strategies that deliver measurable impact. Her expertise spans organizational design, leadership development, workforce planning, and large-scale business transformation. She brings a strong track record of building high-performing teams, strengthening leadership capability, and driving alignment across global organizations.

Prior to joining Syniverse, Sandra served as Chief Human Resources Officer and Executive Vice President at Santander Consumer USA, where she led enterprise-wide talent and culture initiatives in a highly regulated, performance driven environment.

Sandra holds a bachelor’s degree in Human Services and Psychology from Judson University. She is actively engaged in community impact initiatives and currently serves on the Board of Directors for Wheels of Success, a nonprofit dedicated to helping individuals achieve self-sufficiency through transportation.

John Wick

EVP and Chief Product Officer

John Wick

John Wick serves as Chief Product Officer and is responsible for the company’s global product portfolio, including product strategy, research and development, product management, and implementation. Previously, he was Syniverse’s Chief Technology officer overseeing technologies for its Carrier and Enterprise business units and Syniverse’s information technologies. During his career at Syniverse, Mr. Wick has been instrumental in the development and success of core products such as Syniverse Secure Global Access, IPX, messaging, and multiple 3G, 4G, and 5G signaling solutions. Mr. Wick joined Syniverse in 1993 and was initially responsible for managing the network operations department. He has held management positions in operations, research and development, technology, business development, and product management groups. Prior to joining Syniverse, Mr. Wick was a systems integrator with Verizon and, earlier, an electronic communications and switching systems technician for the U.S. Air Force. Mr. Wick graduated with bachelor’s and master’s degrees in business from Nova Southeastern University. He also holds an associate degree in electronic engineering technology from the Community College of the Air Force and is a certified Six Sigma Black Belt. Mr. Wick currently represents Syniverse on the board of the Competitive Carriers Association (CCA) and the Executive Advisory Board of the Innovative Operators (IO) association.