About Us

Leadership

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

  • Executive Team
  • Board of Directors

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 and 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 software through partnerships with leading PC manufacturers, Ring Zero Systems was acquired by Motorola.

Shmunis was named a 2014 Ernst & Young Entrepreneur of the Year™, Northern California Region. He holds bachelor’s and master’s degrees in computer science from San Francisco State University and is a named inventor on a number of U.S. patents.

David Berman

President

David Berman is President of RingCentral, where he provides leadership across the business to develop, communicate, and implement RingCentral’s vision, mission, and overall strategic direction. With more than 20 years of experience in the software technology industry, Berman is known for his innovative, highly successful sales and go-to-market strategies as well as his expertise leading high-performing organizations.

Prior to joining RingCentral, he served as president and CEO of Affectiva, Inc.—the global standard for real-world accuracy and relevance in emotion analytics. It was here that Berman developed the Affex SaaS platform for facial coding, based on innovative research from Massachusetts Institute of Technology (MIT).

Before that, Berman was President of Worldwide Sales and Services at WebEx Communications, a position that he retained during the company’s acquisition by Cisco. In that role, he was responsible for WebEx’s revenue plan and their go-to-market strategy. A pioneer in the SaaS industry, Berman created and implemented the revolutionary web-touch sales and support model, which was key to the company’s 100-fold revenue growth.

Along with his role at RingCentral, Berman is a member of the boards of directors of Affectiva, WatchDox, and ooVoo. He holds a bachelor’s degree in business administration from the University of San Diego.

Clyde Hosein

Executive Vice President and Chief Financial Officer

Clyde Hosein is the Executive Vice President and Chief Financial Officer at RingCentral. Prior to RingCentral, Hosein served as the CFO of Marvell Technology Group and also briefly served as their Chief Operating Officer.
Prior to Marvell, he held Chief Financial Officer positions at IDTI and Candescent Technologies—a display startup. Earlier in his career, he held engineering, operations, and finance positions at IBM. Hosein is a highly regarded executive in the technology industry and is well-known by the investment community. He was named by Institutional Investor as one of the top 3 CFOs in the semiconductor industry for 3 consecutive years.

He also sits on the board of directors of Cree, Inc., a publicly traded company that develops and manufactures LED products. Hosein holds an master’s degree in business administration from New York University Stern School of Business and a bachelor’s degree in industrial engineering from Polytechnic University in New York.

Kira Makagon

Executive Vice President of Innovation

As RingCentral’s Executive Vice President of Innovation, Kira Makagon leads product strategy, product management, engineering, and operations. She has more than 20 years of product strategy, global technology management, and senior leadership experience. Prior to joining RingCentral, Makagon founded and served as the president of Red Aril, a pioneer in real-time audience and media optimization solutions that was acquired by iCrossing, a Hearst company. Prior to that, Makagon co-founded and held key executive positions in flagship online marketing and CRM companies, including Octane Software, which was acquired by E.piphany, and Scopus Technology, where she brought multiple generations of CRM products to market.

Makagon holds a bachelor’s degree in computer science from the University of California, Berkeley and a master’s degree in business administration from the Haas School of Business at the University of California, Berkeley.

Dave Sipes

Executive Vice President of Marketing and International Business

David Sipes is the Executive Vice President of Marketing and International Business at RingCentral. He is a technology entrepreneur with rich sales and marketing expertise in the B2B sector. Before joining RingCentral, Sipes co-founded Branders.com, the nation’s largest online B2B seller of promotional items, and served as the company’s COO for 9 years. Prior to that, Sipes worked in brand management at Pepsi-Cola and was a principal at Booz Allen Hamilton in their marketing intensive group providing strategic guidance to marketing and media companies such as Heinz Corporation, Callaway Golf, and Universal Pictures.

Sipes holds a master’s degree in business administration with an emphasis in marketing from Kellogg School of Management at Northwestern as well as a bachelor’s degree in business from the University of California, Berkeley.

Praful K. Shah

Senior Vice President of Strategy

Praful Shah, the Senior Vice President of Strategy for RingCentral, is responsible for defining the company’s business, product,and marketing strategy. Shah brings more than 20 years of experience with major technology companies in the software and cloud industries. Before joining RingCentral, he worked at WebEx from its founding days until its acquisition by Cisco in 2007. At WebEx, Shah held various executive management positions, including Vice President of Strategic Communications, Online Products, Product Marketing, and Business Development. Shah previously served as the Senior Director of Marketing for the database and internet products divisions at Oracle. Prior to joining Oracle, Shah held senior-level positions at Tandem Computers in product marketing and performance engineering.

Shah holds a bachelor’s degree in electronics and communications engineering from the Manipal Institute of Technology in India and a master’s degree in computer science from Pennsylvania State University.

Ryan Azus

Senior Vice President of Worldwide Sales

As RingCentral’s Senior Vice President of Worldwide Sales, Ryan Azus is responsible for growing the company’s sales channels and developing new markets. He has 12 years of executive-level experience in the software-as-a-service and internet industries. Prior to joining RingCentral, Azus worked at both Cisco and WebEx. As WebEx’s Vice President of Online Sales, he was a key contributor to WebEx’s success from a pre-IPO company in 2000 through its acquisition by Cisco Systems.

Azus holds a bachelor’s degree in finance and marketing from California Polytechnic State University at San Luis Obispo.

John Marlow

General Counsel and Senior Vice President
of Corporate Development

John Marlow serves as RingCentral’s General Counsel and Senior Vice President of Corporate Development, where he oversees business and legal affairs. Before joining RingCentral, Marlow was the founding and managing partner of Entrepreneurs Law Group (ELG), a boutique law firm based in San Francisco that specializes in corporate, securities, tax, and intellectual property matters. Before founding ELG, Marlow was a partner in the San Francisco office of Reed Smith, a full-service, international law firm.

Marlow received his law degree from Boalt Hall School of Law at the University of California, Berkeley and earned his bachelor’s degree, summa cum laude, from Colgate University.

Vlad Vendrow

Co-Founder and Chief Technology Officer of RingCentral

Vlad Vendrow is the Co-Founder and Chief Technology Officer of RingCentral, where he is the key architect of the RingCentral cloud phone solution. In this position, he is responsible for enabling RingCentral’s innovation while ensuring overall scalability and availability.

Prior to RingCentral, Vendrow served as the Director of Engineering at Ring Zero Systems and Motorola. His accomplishments include leading the development of the Ring Zero phone and fax communications software that shipped more than 25 million copies worldwide.

Vendrow has been granted more than a dozen patents in the areas of unified communications, fixed-mobile convergence, and cloud services. He holds a master’s degree in computer science and applied mathematics from Saint Petersburg Electrotechnical University in Russia.

Walt Weisner

Senior Vice President of Global Customer Care

Walt Weisner is the Senior Vice President of Global Customer Care at RingCentral, where he is responsible for delivering top-notch service to RingCentral’s customers and partners. Weisner is an experienced SaaS executive with a track record of building world-class service and support organizations focused on delivering success for both small-business and enterprise customers. Most recently, he served as Senior Vice President of Global Customer Care at Good Technology. There, he developed and scaled key areas, including customer-and partner-satisfaction programs and worldwide customer care—and he also led the company’s cross-functional customer-experience initiatives. Prior to Good Technology, Weisner held executive leadership positions at ServiceNow, Shoretel, and WebEx where he developed and nurtured highly successful post-sales service and support teams in charge of worldwide technical support, training and certification, installed base-account management, customer retention, and voice-of-the-customer programs. He also led similar teams at InternetConnect and Nextel.

Richard Borenstein

Senior Vice President of Business Development

Richard Borenstein, the Senior Vice President of Business Development for RingCentral, is responsible for identifying and enabling key strategic relationships that power rapid revenue growth and market adoption. A true entrepreneur with unlimited energy and drive, he has built an extensive, worldwide executive network. He has a consistent record of driving revenue and creating mutually beneficial, long-term partnerships—which have helped accelerate the growth and success of early-stage companies such as Airborne Entertainment, Baynote, Zong, and most recently, ItsOn. In addition, Borenstein also has deep experience operating at scale with market leaders such as Bell Canada and PayPal. He excels in both U.S. and international market expansion, enterprise sales strategies, recruiting, and team building. He holds a bachelor’s degree in political science from McGill University.

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.

Doug Leone

Partner at Sequoia Capital

Doug Leone works with mobile, Internet, software and communication companies. Prior to joining Sequoia Capital in 1988, Leone held sales and sales management positions at Sun Microsystems, Hewlett-Packard and Prime Computer. He has a BS in Mechanical Engineering from Cornell University, an MS in Industrial Engineering from Columbia University, and a MS in Management from the Massachusetts Institute of Technology.

Rob Theis

Managing Director at Scale Venture Partners

David Weiden is a Partner at Khosla Ventures. His investment focus includes Internet software, digital media services, and communications. A number of Weidan’s investments have been significant acquisitions or had IPOs including Bitfone (HPQ), Good Technology (MOT), GroupMe (Skype/MSFT), Ingenio (T), LogMeIn (LOGM), Opsware (HPQ), Slide (GOOG), and Tellme (MSFT). He has been recognized by Fortune and Forbes as one of the top rising tech investors.

David Weiden

Partner at Khosla Ventures

David Weiden is a Partner at Khosla Ventures. His investment focus includes Internet software, digital media services, and communications. A number of Weidan’s investments have been significant acquisitions or had IPOs including Bitfone (HPQ), Good Technology (MOT), GroupMe (Skype/MSFT), Ingenio (T), LogMeIn (LOGM), Opsware (HPQ), Slide (GOOG), and Tellme (MSFT). He has been recognized by Fortune and Forbes as one of the top rising tech investors.

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.

Dr. Bobby Yerramilli-Rao

Co-founder and Partner at Hermes Growth Partners

Bobby Yerramilli-Rao is co-founder and partner at Hermes Growth Partners, focusing on growth stage investment opportunities in the TMT sector.

He has served as Marketing and New Businesses Director for Vodafone Internet Services, the division of Vodafone responsible for consumer data services and data related revenues globally.

Yerramilli-Rao joined Vodafone as Corporate Strategy Director, responsible for formulating the strategy for the Group. He has served on the investment committee of Vodafone Group and has represented the company at the GSMA Board.

Before Vodafone, he was a partner at McKinsey and Company in Palo Alto, New York and London, focused on telecoms, new media and high tech. He holds an M.A. in Electrical Engineering from the University of Cambridge, and a DPhil in Robotics from the University of Oxford. He has held research positions at the University of California at Berkeley, and has worked as an engineer at GEC Research.