Perpetual Federal Savings and Loan, Washington's largest savings and loan institution, has promoted Robert F. McConkey to secretary of the organization. McConkey will retain his previous title and duties as senior vice president in charge of mortgage operations.

Perpetual also announced the promotion of Ross Towne, a vice president with the firm, to treasurer.

McConkey is a member of the board of directors and executive committee of the D.C. Housing Industry Corp., a non-profit organization engaged in the development of low and moderate cost housing in the District. He is a past president of both the Metropolitan Washington Savings Associations Financial Enterprises Inc.

Towne worked in the audit division of Arthur Anderson and Co. and as treasurer for First Virginia Mortgage and REIT before joining Perpetual in 1977.

J. Christopher Burns has been appointed as an assistant to the president of The Washington Post Co. effective Aug. 1.

Prior to his appointment, Burns was a consultant in communications technology for Arthur D. Little Inc. of Cambridge, Mass. Prior to that he worked as a consultant to magazines, newspapers and book publishing firms, specializing in publishing systems.

Michael J. Aquillo has been elected a senior vice president of the Riggs National bank. Aquilino, who has been with the bank's trust department since 1957, is currently in charge of the ttrust department operations.

J. Michael Brady has been appointed assistant controller of Allegheny Airlines. He came to Allegheny in 1976 as manager-taxes and most recently served as director-taxes.

Gary L. Jones has been named vice president of administration of the American Enterprise Institute for Public Policy Research.

Jones joined AEI in 1973 as assistant to the president for administration after serving on the staff of Sen. Robert Griffin for three years.

Nicholas T. Camicia, chairman, president and chief executive officer of the Pittston Co. and Steven Muller, president of The Johns Hopkins University were elected as directors of Chessie System Inc. and its principal subsidiary, the Chesapeake and Ohio Railway Co.

Camicia has been chief executive officer and president of Pittston, the nation's largest independent coal producer, since 1970. He joined the company as president in 1969 after serving as president of the United Electrical Coal Companies.

Muller became the tenth president of Johns Hopkins on Feb. 1, 1972. Later that year he also was named president of Johns Hopkins Hospital.

George P. Beard Jr., chairman of the Second National bank of Culpeper, was recently elected president of the Virginia Bankers Association. He succeeds William H. Jefferson Jr.

Beard joined Second National in 1941, became cashier in 1953, executive vice president and trust officer in 1958, president in 1966 and chairman and president in 1973. In March 1976 he was elected chairman, chief executive officer and trust officer.

Robert M. Garriques, CLU, general manager of Acacia Mutual Life Insurance Co. agency in Rockville, has won the 1978 National Management Award of the General Agents and Managers Conference of the National Association of Life Underwriters. He has served as general manager of the Acacia agency since 1971.