Katherine Friedman has been named director of catering for the Sheraton Carlton Hotel. Friedman was formerly catering manager with the Madison Hotel and catering sales manager with the Washington Marriott Hotel.

Remo Sampieri has been appointed general manager of the Centre Plaza Holiday Inn in Rockville. He was formerly general manager of the Holiday Inn in Bethesda. Mel Bronstein has been appointed director of sales and marketing for the Centre Plaza.

Hans A. Jaspers has been named manager of the Sheraton Washington Hotel. He was formerly area food and beverage director for the Sheraton Corp.

James C. Sakes has been elected to the executive committee of the board of directors of the American Hotel and Motel Association. He is general manager of the Holiday Inn in Gaithersburg.

Joseph M. Kristoff has been appointed executive assistant manager of the Henley Park Hotel.

Stephen P. Bower has joined the national sales office of Meridian Hotels Inc. in Washington.

Douglas M. Flamm has joined the food service industry supply firm Abco Corp. as director of marketing. Flamm was formerly an account executive with Ernest Wittenberg Associates Inc.

Rose Narva has been appointed vice president of the hotels division of Murdock Development Co. Narva was formerly managing director of the Jefferson Hotel.

William S. Babb has been named president of Babb Food Brokers in Beltsville. He succeeds his father, William Babb, who becomes chairman and chief executive officer.