A.H. Robins Co. has elected its founder's great grandson, E. Claiborne Robins Jr., president and chief executive as of Jan. 1, 1978. William L. Zimmer III, who now holds the top slot, will retire at that time.

Robins has been with the Richmond-based pharmaceutical firm since 1968, when he graduated from college. He has been executive vice president since 1975. His father, E. Claiborne Robins Sr., is chairman of the board. Zimmer will continue to serve as a director.

Dart Drug has appointed Robert M. Haft vice president for corporate planning and development.

Haft joins his parents in the company's corporate offices. His father, Herbert H. Haft, is president and chief executive officer and his mother, Gloria Haft, is a vice president.

American Satellite Corp. has named Harold R. Johnson vice president for marketing. Johnson was previously vice president for marketing and service development at Western Union Telegraph Co., he was involved with the company's satellite communications service.

Union Trust Co. of Maryland has promoted Gloria E. Dandy to vice president for business development.

Dandy joined Union Trust in 1951 as a teller. She has been an assistant vice president since 1974 and since 1976 she has been one of two business development officers for the Baltimore Metro East region of the bank's community banking division.

Metropolitan Federal Savings and Loan Association of Bethesda, has elected Frederick S. Genau vice president. Genau joined Metropolitan in 1972 with 18 years of experience in S&Ls.

Newport News Industrial Corp. has named John R. Polli vice president of marketing. Polli will direct all sales, planning and advertising.

Polli joins NNI with more than 15 years of experience in the nuclear power industry with NUS Corp. and General Electric Co. NNI is a subsidiary of Newport News Shipbuilding and produces and markets a variety of components and services for power plants.

Bankers Security Life Insurance Co., an affiliate of International Bank of Washington, has elected James R. Frise vice president of systems and electronic data processing.

Herbert L. Munday has been elected treasurer of Washington Gas Light Co. He will continue to serve as assistant vice president for finance.

Former chairman and executive vice president of First Georgetown Securities Geoffrey A. Klingman has opened G.A. Klingman & Co., Inc., in Rosslyn. The firm will specialize in municipal and government agency bonds.

Klingman named Ann Finn executive vice president and Kenneth Vinograd senior vice president.

State National Bank of Maryland has promoted Dennis E. Berry vice president of the installment loan department. Berry joined State National in 1976 after being with Alexandria National Bank.

NEW DIRECTORS: The Ryland Groups, Inc., has elected Charles E. Peck and Andre W. Brewster to the board. Peck is a group VP and director of Owens-Corning Fiberglas Corp. and Brewster is a general partner in the Baltimore law firm of Piper and Marbury.

Diplomat National Bank elected Harry J. Zink, Dr. Charles C. Yu and Dr. Soo Young Oh to the board. Zink is managing director of the National Transportation Safety Board, Yu is chairman of the department of anesthesia of Potomac Hospital and Oh is in private practice in Hyattsville.

American Indian National Bank has elected Ruby Black, chairperson of the Ute tribe, and Andrew W. Ebona, executive director of the United Indian Planners Association, to the board.

Union First National Bank of Washington has named J. William Middendorf to the board. Middendorf is chairman and president of Financial General Bankshares, Inc.

Park and Shop, Inc., has elected six new directors. They are: Simon Block, vice president, Mazor's Furniture; Jerome Broder, president, Treasure Trove Jewelers; Jimmy Muscatello, president, Muscatello's Uniforms; Norman Orleans, president, Cavalier Men's Shop; Samuel Zweig, secretary, Penn Camera Exchange; and Theodore Lutz, general manager, Metro.

Commercial Credit Co. of Baltimore, a subsidiary of Control Data Corp., has elected Lois Dickson Rice to the board. She is a vice president of the College Entrance Examination Board.

julia M. Walsh, chairman of Julia Walsh & Sons, has been elected to the board of Pitney Bowes. Walsh has been a Washington area stockbroker since 1955 when she joined Ferris & Co.