San Francisco -- Linden Lab, the San Francisco-based developer of 3D virtual world Second Life, has named Mark Kingdon as its new CEO, replacing company founder Philip Rosedale, who will remain chairman. Since 2001, Kingdon has served as the CEO of Organic Inc., a digital communications agency. Prior to that, he had been a partner with the consulting division of PricewaterhouseCoopers. "Our search for the leader of Linden Lab demanded both tremendous business skills and a deep understanding and passion for Second Life and where it is going," said Rosedale. Kingdon will officially assume the role on May 15.