ATLANTA -- Travel Transaction Processing Corp., a newly formed company owned by Citigroup Venture Capital and Teachers' Merchant Bank, has acquired Worldspan, a major provider of technology and reservation services for the travel industry.

Worldspan also announced the appointment of M. Gregory O'Hara as executive vice president for corporate planning and development. O'Hara was also elected to the Worldspan board of directors.

O'Hara will oversee strategic and technology relationships with car rental companies as well as airlines, hotels and other travel suppliers. He has also assumed corporate development and planning functions.

Rakesh Gangwal, Worldspan's chairman, president and chief executive officer, said: "Greg is a tremendously talented individual with unique skills and proven business acumen. He is a superb addition to our team and will greatly enhance Worldspan's ability to develop new business and to focus on our customers' needs."

Previously, O'Hara served as senior vice president of global services at Sabre.