About us


Meet the leaders of the leading business cloud communications system company.

  • Executive Team
  • Board of Directors

Vlad Shmunis Vlad Shmunis CEO, Founder and Chairman
of the Board

Clyde Hosein Clyde Hosein Executive Vice President and
Chief Financial Officer

Kira Makagon Kira Makagon Executive Vice President
of Innovations

Dave Sipes Dave Sipes Executive Vice President
of Corporate Development

Praful K. Shah Praful K. Shah Senior Vice President
of Strategy

Al Campa Al Campa Senior Vice President and
Chief Marketing Officer

Ryan Azus Ryan Azus Senior Vice President
of Worldwide Sales

John Marlow John Marlow General Counsel and Senior Vice
President of Corporate Development

Vlad Vendrow Vlad Vendrow Co-Founder and Chief Technology Officer of RingCentral

Walt Weisner Walt Weisner Senior Vice President of Global
Customer Care

Richard Borenstein Richard Borenstein Senior Vice President of Business

Vlad Shmunis

Chief Executive Officer, Founder and Chairman of the Board at RingCentral

Vlad Shmunis founded RingCentral in 1999 and launched RingCentral's cloud business phone service in 2003. He developed the service based on the need he saw among businesses for an alternative to inflexible and expensive hardware-based phone systems.

Since founding RingCentral, Shmunis has led the company in reimagining business communications. Today, the company empowers hundreds of thousands of businesses and their employees to work with unparalleled freedom and in imaginative new ways, via a wide variety of mobile and fixed line devices in traditional as well as dispersed work environments.

Shmunis has more than 25 years of industry and management experience. Prior to launching RingCentral, he founded and served as the CEO of Ring Zero Systems, a desktop software communications company. After shipping more than 25 million copies of its Windows software through partnerships with leading PC manufacturers, Ring Zero Systems was acquired by Motorola.

Shmunis was named the Ernst & Young Entrepreneur Of The Year® 2011 Northern California Award finalist. He holds bachelor’s and master’s degrees in computer science from San Francisco State University, and is a named inventor in a number of U.S. patents.

Rob Theis

Managing Partner of Garnett Theis Capital

Rob Theis is a Co-Founder and Managing Partner of Garnett Theis Capital. Previously, he was a Managing Director with Scale Venture Partners, investing in SaaS, Technology Infrastructure, Cloud Application Companies, Mobile and Digital Media. In addition to serving as a director of RingCentral, while at Scale, Rob invested and was a Board Member of the following companies: BrightRoll (Acq: Yahoo), HubSpot (NYSE), PeopleMatter, SailThru and sourced DocuSign and Vitrue (Acq: Oracle).

Prior to joining Scale in 2008, Rob was a General Partner with Doll Capital Management (DCM) and invested in leading companies such as Fortinet (NASDAQ: FTNT), Jaspersoft (Acq: Tibco), NeoPath Networks (Acq: Cisco), PGP Corporation (Acq: Symantec), Roamware, VanceInfo (NYSE: VIT), Tapulous (Acq: Disney) and SigFig.

Before joining DCM, Theis served as COO/EVP of New Era of Networks (NASDAQ: NEON), where he grew the company to $200 million in revenues and led NEON through a successful IPO. Prior to NEON, Rob spent 10 years in executive roles at Sun Microsystems, where he drove growth in a series of new strategic initiatives, including Sun’s over $1 Billion success in the Financial Services Industry sector. Rob’s previous experience includes marketing management at Silicon Graphics’ and in sales at McDonnell Douglas Corp. (Boeing).

Rob holds a B.A. in Economics from the University of Pittsburgh and is a Sheriff mountain rescue specialist and rescue diver.

R. Neil Williams

Senior Vice President and Chief Financial Officer at Intuit

R. Neil Williams became Intuit’s senior vice president and chief financial officer in January 2008. Williams has nearly 30 years of strategic, operational and transactional experience in the financial services industry. He is responsible for all financial aspects of the company, including corporate strategy and business development, investor relations, financial operations and real estate.

Before joining Intuit, Williams was the executive vice president and chief financial officer for Visa U.S.A., Inc. In that role, he led all financial functions for the company and its subsidiaries, including financial planning, business planning and financial monitoring. Williams concurrently served as chief financial officer for Inovant LLC, Visa's global information technology organization, responsible for global transactions processing and technology development.

His previous banking experience includes senior financial positions at commercial banks in the Southern and Midwestern regions of the United States.

Williams, a certified public accountant, received his bachelor’s degree in business administration from the University of Southern Mississippi.

Michelle McKenna Doyle

Chief Information Officer at the NFL

Michelle McKenna-Doyle joined the NFL as Chief Information Officer in September 2012. Prior to that, she was Chief Information Officer at Constellation Energy, where she implemented major technology strategic initiatives and led the company’s integration with Exelon upon the firm’s merger. From 2007 to 2010, she was SVP and Chief Information Officer at Universal Orlando Resort. She previously spent more than 13 years at the Walt Disney World Company where she held senior leadership positions in Finance, Marketing and Information Technology.

Mike Kourey

Chief Financial Officer at Medallia

Mike Kourey is currently the Chief Financial Officer at Medallia and has held executive, board, and advisory roles at high-growth technology companies for more than 25 years. He is a board and audit committee member at various private growth companies. Previously, he served on the board of directors and the audit committee of Aruba Networks until its acquisition by Hewlett-Packard in May 2015, and on the board of directors and as audit committee chair at Riverbed Technology. He also served as a Partner at Khosla Ventures from 2012 to early 2015. Prior to Khosla, Kourey was the CFO at Polycom from 1995 to 2012, and a board member there from 1999 to 2011.

Kourey holds a bachelor of science from the University of California, Davis, and an MBA from Santa Clara University.

Allan Thygesen

Vice President at Google Inc.

Mr. Thygesen has served since September 2011 as Vice President at Google Inc. (a subsidiary of Alphabet Inc.), and is currently Vice President, Global SMB Sales and Operations. He is also a lecturer at the Stanford Graduate School of Business. Before joining Google, Mr. Thygesen consulted to Google and other companies in 2010 and until September 2011 and previously co-founded an early stage venture firm and was a managing director and partner in the U.S. venture and growth funds of The Carlyle Group, where he led investments in startups in sectors including e-commerce, mobile advertising and imaging. Earlier, Mr. Thygesen served as an executive in several public and private companies, including Wink Communications, which he helped take public in 1999. Mr. Thygesen has also served on the boards of directors of various private companies.