Christopher Burns, vice president for planning of The Washington Post Co., has been named associate publisher of The Minneapolis Star and Minneapolis Tribune. Burns will be responsible for the advertising, promotion, research and planning departments.

Burns joined the Post in 1978. He established a new planning function that set policies and systems for the Post Co.'s 15 profit centers. Prior to that he was a senior consultant for Arthur D. Little Inc., directing the firm's research and consulting activities in publishing, information technology and office information systems.

Steven B. Hellem has joined E. Bruce Harrison Co. as vice president. The firm provides communications management services.

The Army Times Publishing Co. has appointed managing editors for two of its magazines. James Barry Robinson was named managing editor of The Times Magazine, a montly insert to the Army Times, Navy Times and Air Force Times. Donna J. O'Neal was appointed managing editor of Military Market, a trade magazine for the military resale system.

Donald F. Riesett has been elected senior vice president of the Baltimore-based advertising firm of W. B. Doner and co.

Bruce D. Smith has been elected vice president for planning and new ventures of Comsat General Corp., a wholly owned subsidiary of Communications Satellite Corp.

Ninamary S. Langsdale has joined the public relations firm of Portez & Jaffe Inc. as senior account executive.

Philip S. Nyborg, has joined the corporate office of MCI Communications Corp. He was previously vice president and general counsel of the Computer & Communications Industry Association.

Daniel R. Bailey Jr. has been named director of promotion for W. B. Doner and Co.

Kenneth O. Wilson has been named executive vice president of Baltimore Cable TV Inc. Wilson is vice president and advertising manager of the Afro-American newspaper.

Paul Synor, who created the "Man From Glad" and started a price war between Budget Rent-a-Car and Hertz, has been named vice president and creative director of Ehrlich-Manes and Associates Inc.

Ann Eggers has joined Earle Palmer Brown and Associates as operations manager.

Joseph T. Santaiti has been appointed president of Musicast of Alexandria. The firm designs, sells, installs and services music, paging, intercom, sound systems and CCTV.

Leonard T. Giarraputo, former executive vice president of Post-Newsweek Stations, has joined Group W Productions as vice president for sales. While with Post-Newsweek, Giarraputo had both station bottom-line and syndication responsibilities. He also directed the establishment of the company's station representative firm, Top Market Television. He was vice president, director of sales for Post-Newsweek from 1970 to 1972 before becoming executive vice president.