Veteran television news correspondent and former White House press secretary Ron Nessen has joined the public relations firm of Robert Marston and Associates and its affiliated company, Marston and Rothenberg Public Affairs.

Nessen becomes senior vice president of Marston and Rothenberg, based in Washington, as well as a senior associate of the New York-based Robert Marston and Associates. He will work in Washington with former White House colleague Ron Aaron Eisenberg, who heads the Washington office, and in New York with Robert Marston and Robert Rothenberg.

Nessen was an NBC news correspondent from 1962 until he went to the White House in 1974. Prior to joining NBC News, he was an editor and writer for United Press International from 1956 to 1962.

Oliver C. Boileau, president of Boeing Aerospace Co., has been named president of General Dynamics Corp., one of the nation's leading defense contractors. Boileau succeeds David S. Lewis, who will continue as chairman and chief executive officer.

Beatrice N. Vaccara has been named to head the Department of Commerce's new Bureau of Industrial Economics. Vaccara is deputy assistant secretary of the Treasury for domestic economic policy and a former Commerce official. The new bureau will provide information and analysis on the nation's structure and its relationship to the economy.

James A. Valliant has been elected chairman of Blind Industries and Services of Maryland.

John J. Blanchard has been named staff attorney for Quality Inns International Inc.

George T. Esherick has been appointed director of public affairs for the Washington office of United States Steel Corp.

B&B Caterers has named H. William Birgfeld III executive vice president, Robert C. Goyena vice president for marketing and Carl David Longley Jr. vice president for operations.

Robert N. Cohen has been elected president of Chemical Specialties Associates.

Robert W. Wening Jr. has been named president of the architectural and engineering firm of Mills, Clagett & Wening. James C. D. Donald and Richard P. Cassagnol were named vice presidents of the company.

American Wholesalers Inc. announced the elections of Seymour D. Wolf as chairman of the board and chief executive officer and Abe J. Bannett as president and chief operating officer.

Charles E. Diehl and Karl W. Corby III have been elected to the Advisory Board of the Branches of The Riggs National Bank.

Doris A. Huddleston has been elected a vice president of Carl Byoir & Associates Inc.

Edward L. Morris has been promoted to vice president and cashier of The Bank of Vienna.