Leaders in Digital Identity and
Programmable Communications

Founded in 2005, by Darren Berkovitz, Ryan Disraeli, and Stacy Stubblefield, TeleSign connects and protects online experiences with sophisticated digital identity and programmable communications solutions. Through APIs that deliver user verification, data insights, and communications we solve today’s unique customer challenges by bridging your business to the complex world of global telecommunications.

Leadership

Joe Burton

Joe Burton

Chief Executive Officer

Joe Burton

Joe Burton

Chief Executive Officer

Joseph Burton is the CEO of TeleSign. Before TeleSign, he served as CEO of Plantronics (now Poly) from 2016 to 2020, after joining the company in 2011 as Chief Technical officer, and then Chief Commercial Officer. He started his career in 1990 as a software engineer, was acquired into Cisco in 2001 and served as Cisco's CTO for Unified Communications until 2010. Burton specializes in digital transformation, growth acceleration, corporate strategy and go-to-market, and has extensive expertise in technology and product development. He was most recently a Senior Advisor to the management consulting company McKinsey & Company. He holds a Bachelor of Science degree in Computer Information Systems and completed the Stanford Executive program at Stanford University (Palo Alto, CA).

Tom Wesselman

Tom Wesselman

Chief Technology Officer

Tom Wesselman

Tom Wesselman

Chief Technology Officer

Tom Wesselman is the CTO and head of product at TeleSign. Prior to TeleSign, he was VP/GM of the software business unit at Plantronics (now Poly) from 2018 to 2021, after joining the company in 2013 as Director of Software. He spent 11 years at Cisco leading teams in security, identity, unified communications, and the strategic alliance with Microsoft. Wesselman specializes in building and accelerating new businesses, developing high-performance teams, and using lean and agile development to deliver both innovation and growth.

Peter Vermeulen

Peter Vermeulen

Chief People Officer

Peter Vermeulen

Peter Vermeulen

Chief People Officer

Peter Vermeulen is the Chief People Officer at TeleSign. With a strong background in finance and analytics, coupled with his human resources expertise, Peter specializes in developing cost-effective, sustainable, and measurable strategies that drive organizational and talent success. Before coming to TeleSign, Peter served as the Global Head of Human Resources & Customer Service for Amazon and he has also held leadership roles at Johnson & Johnson and the Linde Group. A Belgian native, Peter is a dual-citizen of the U.S. and Belgium and is fluent in English, Dutch, French, and German, and is proficient in Danish. Peter holds a GPHR certificate from the HRCI, where he formerly served as a member of the Board of Directors. He earned a Master of European Studies degree from the University of Strasbourg, France, and a Master of Business Economics from the University of Leuven, Belgium.  Peter is the co-author of the book Be(come) an AWESOME Manager and has also been awarded both the National Diversity Council Leadership Award and the Global Mobility Award.

Stacy Stubblefield

Stacy Stubblefield

Co-Founder

Stacy Stubblefield

Stacy Stubblefield

Co-Founder

Stubblefield co-founded TeleSign in 2005 and today helps to drive TeleSign's product strategy and identify opportunities for innovation--ensuring that TeleSign delivers groundbreaking technology that best addresses market needs. As part of TeleSign's founding team, she was instrumental in conceptualizing and developed its platform and patented technology. While developing TeleSign's technology, she also oversaw an engineering team at an internet incubator that launched several fast-growing web properties. She remains an active consultant, advising internet start-ups and consumer product sites and is a frequent speaker at industry events, including Mobile World Congress and Mobile Computing Summit.

Wei Lin

Wei Lin

Vice President, Engineering

Wei Lin

Wei Lin

Vice President, Engineering

Wei Lin oversees TeleSign Engineering organization and is responsible for product development. Lin is a college lecturer and a veteran of software industry and held various leadership roles at Symantec, CAE and Leco Instrument. Prior joining TeleSign, she taught computer science at the Computer Science Department of California Polytechnic State University Pomona. Previously, Lin spent 16 years at Symantec where she was a Sr Director of Engineering responsible for development of various Norton security products, Norton eCommerce, and core security solutions included in both Norton and Symantec enterprise products.

Yoon Ahn

Yoon Ahn

Vice President, Global Tech Ops

Yoon Ahn

Yoon Ahn

Vice President, Global Tech Ops

Yoon is responsible for keeping all network systems running smoothly and efficiently in order to provide clients with a reliable and consistent experience. He has over 16 years of experience in providing reliable operations in several industries, from supporting and managing small to large organizations.

Yoon is an ever-evolving technologist at heart, who enjoys tinkering with and learning about the latest technology and gadgets. When he is not working, he can be found on the golf course.

Mac Kern

Mac Kern

Vice President, Financial Planning & Analysis

Mac Kern

Mac Kern

Vice President, Financial Planning & Analysis

Kern oversees all routing and pricing analysis for TeleSign. Prior to joining TeleSign, he was the VP, Commercial Strategy at Surf Air, responsible for optimizing route cost and pricing strategy of the airline.  Prior to Surf Air, Mac worked at Virgin America, focused on Revenue Management.

Nenad Vucinic

Nenad Vucinic

General Manager, Belgrade

Nenad Vucinic

Nenad Vucinic

General Manager, Belgrade

As TeleSign’s GM, Nenad focuses on the team in Belgrade by improving processes, programs and communication channels, as well as employer branding and community engagement. From 2012-2017 Nenad grew the Serbian office to more than 160 employees which supported all of TeleSign’s global operations. His background includes leadership roles in both enterprise and startup environments in IT, Telecommunications and FMCG industries. He has scaled several companies across Central and South Eastern Europe. In addition, Nenad is very active in the Belgrade community belonging to various economic associations.

Talk To An Expert

Interested in learning about how TeleSign's identity and engagement solutions can prevent fraud while fostering secure and global growth for your business? Let's chat.