John is currently Executive Vice President of Turn. He has over 25 years of experience in startups and research, in entrepreneurial, managerial, and technical roles.

Most recently, John was SVP Engineering and Operations for AltaVista and helped turn around the Web-search pioneer, leading to a successful $140M acquisition by Overture and then Yahoo. He hired industry technical leaders and led the team in greatly improving AltaVista’s search products, once again innovating in Web search, and gaining parity with industry-leading Google.

Prior to AltaVista, John was an Entrepreneur in Residence at New Enterprise Associates, helping to launch a storage startup. In 1996, he co-founded Post Communications, the first email-marketing company based on relationship marketing. As VP of Technology, he helped grow Post to 150 employees, 70 clients, and 3 terabytes of managed customer data, enabling an acquisition by Netcentives for $380 million. At Open Market, he led a team building a first-generation content-push product for Time-Warner.

John spent over 15 years at Xerox PARC, Digital Equipment's Systems Research Center, and Yale University, researching compilation for VLIWs, programming environments, distributed computing, garbage collection, and wireless PDAs, and receiving two patents in programming-language implementation. He received a BSE from Princeton University and a PhD from Yale University, and his thesis won the 1985 Association for Computing Machinery Best Dissertation Award and was published by MIT Press.