LAKE SUCCESS, NY - DealerTrack Holdings, Inc. has elected John J. McDonnell, Jr. to its board of directors.

McDonnell is the founder, chairman, and CEO of TNS, Inc., a provider of data communications services to processors of credit card, debit card, and ATM transactions worldwide. Previously, he served as chairman and CEO of PaylinX Corp., a software provider for transaction processing, from November 1999 until it was sold to CyberSource Corp. in September 2000. He remains a director of CyberSource.

McDonnell was the recipient of KPMG Peat Marwick LLP's 1997 High Tech Entrepreneur Award and the Rensselaer Polytechnic Institute 2002 Entrepreneur of the Year Award. In 2004, he was named one of the top 100 Irish American businessmen by Irish America magazine. He also serves on the North American Advisory Board for the Prime Minister of Ireland.