Lifesize® Adds Senior Marketing and Sales Leaders to Executive Team May 8, 2007 John Doyle Appointed Chief Marketing Officer; Adam Taylor Named Executive Vice President of Worldwide Sales and Customer Service Austin, Texas, May 8, 2007 Lifesize®, the high definition video communications company, today announced that two senior executives have joined Lifesize to bolster the company’s global marketing, sales and support organizations. John Doyle, who was previously with Secure Computing – a leading enterprise gateway security company (Nasdaq: SCUR) – has been appointed chief marketing officer and Adam Taylor, formally with Avid Technology – the world leader in digital nonlinear media creation, management, and distribution solutions (NASDAQ: AVID) – has been named executive vice president of worldwide sales and customer service. Doyle and Taylor will both be located at Lifesize headquarters in Austin, TX, reporting to Lifesize CEO, Craig Malloy. “We are very fortunate to have John and Adam onboard as they bring over 35 combined years of technology expertise with successful track records in their respective fields,” said Craig Malloy, CEO of Lifesize. “Lifesize is poised for explosive growth in the next few years, and both John and Adam will be instrumental in ensuring we continue to fuel the momentum already experienced as the leaders in high definition video communications.” John Doyle has over twenty years experience in the data communications and network security industries. At Secure Computing Corporation he served as vice president of product marketing, responsible for the company’s firewall, secure content management, and identity and access management portfolios. Doyle joined Secure Computing through the Cyberguard Corporation acquisition where he was vice president of global marketing. Prior to CyberGuard, Doyle was responsible for global product marketing for the enterprise security and routing portfolios at Nortel Networks (former Bay Networks), and he has also held leadership positions at other networking companies including Netlink (acquired by Cabletron), IDEA, Softlinx (co-founder), Data General and Raytheon. “High definition video communications will dramatically transform the global business environment over the next decade as enterprises and SMBs enable video in their networks,” said Doyle. “Lifesize created this space and is well positioned to make high definition video communications a reality on a mass scale. This market is poised to explode and I’m excited to be part of the organization that is leading the charge.” Over the past 15 years Adam Taylor has been a key contributor in helping to guide Avid Technology from a $7 million per year venture-backed startup company to an over $900 million publicly-traded corporation. Taylor has great experience building high performance teams, managing significant financial responsibility, growing diverse distribution and hybrid sales models, and creating field marketing programs that drive awareness and demand. Prior to Avid Technology, Taylor held senior sales and sales management positions at Xerox Business Systems, AM International and Lanier Business Products. “As a veteran of fast paced growth enterprises, I was attracted to Lifesize given the truly unique position we have to positively impact the marketplace,” said Taylor. “Lifesize has a significant technology lead coupled with excellent visibility, is progressive and growing at a very rapid pace, and our customers and partners are committed supporters of high definition video communications. I am very excited about Lifesize’s prospect for the future and look forward to playing an integral part in the company’s ongoing success.” Rob Hughes, who has run Lifesize’s worldwide sales and support organization since its inception, will assume the role of senior vice president of Americas sales operations, reporting to Taylor. “Rob has been instrumental in driving the company’s initial growth and building a solid worldwide channel network and sales and support organization” said Craig Malloy. “His desire to spend more time with family is allowing us to focus his efforts on the Americas, where Rob will undoubtedly continue being a major contributor to Lifesize’s future success.” Lifesize offers a fully integrated and interoperable high definition video communications product suite that enables all types of businesses around the globe to more effectively interact and collaborate across distances. Customers include AIC Ventures, Barclays, Blackstone Group, CAPTRUST Financial Advisors, Case Western Reserve University, Goldman Sachs, GrossologyLIVE, House Production & Casting, Indianapolis Museum of Art, Kilpatrick Stockton, Nottingham University Hospitals, Oldham Metropolitan Borough Council and Salud Family Health Centers.