Gregory J. Koczanski, 42, co-director in Washington of federal government relations for Citigroup Inc., a financial services company, fell to his death Aug. 14 while hiking with a group near the summit of Longs Peak in Rocky Mountain National Park in Colorado.

Mr. Koczanski, who lived in Vienna, fell 450 feet down the 14,255-foot mountain, according to officials of the park. They said that the incident was under investigation and that his is the third fatality on the mountain in less than two weeks.

Mr. Koczanski began his career with Citibank in 1981 and later was director of board and policy administration.

He was named director of state government relations in Washington in 1995 and was named co-director of federal relations after Citicorp's merger last year with Travelers Group.

Mr. Koczanski was a native of Stamford, Conn., and a graduate of Georgetown University, where he sang in the Chimes group.

He was co-chairman of the Christmas in April home rehabilitation group in Washington and a member of McLean Bible Church and the John Quincy Adams Society.

Survivors include his wife, Kathryn Pinkerton Koczanski, and two daughters, Alison and Alexis, all of Vienna; his mother, Mary Tihansky of Stamford; a brother; and three sisters.