Century National Bank of Chevy Chase has announced the appointment of Jerome P. Baroch Jr. as president, chief executive officer and director of the bank.

Barock, a native of Baltimore, comes to Century from the Northwestern Bank in Winston Salem, N.C., where he was executive vice president. He previously served as a regional vice president with First National Bank of Maryland.

John E. Blomquist, president and chief operating officer of Reynolds Metals Co., has been elected chairman of the Aluminum Association. Elected to the post of vice chairman was R. Richard Van Horne, president of the Anaconda Co., aluminum division.

Blomquist joined Reynolds in 1940 as a sales representative. He was elected executive vice president in 1975 and president and chief operating officer in February 1978.

Van Horne has been with Anaconda since 1955. He assumed the presidency of the aluminum division in 1974.

John F. McGillicuddy has been elected chairman and chief executive officer of Manufacturers Hanover Corp. and its principal subsidiary, Manufacturers Hanover Trust Co., effective April 1, 1979 when the current chairman, Gabriel Hauge, will retire.

Hauge will continue as a director of both the trust company and the corporation after his retirement.

James C. Barr has been named executive vice president and director of governmental affairs for the Credit Union National Association Inc., effective Dec 1.

Barr joins the association after serving since 1971 as executive vice president of the National Association of Federal Credit Unions.

Louis C. Reichbauer has been appointed executive director of international trade for the National Machine Tool Builder's Association.

Reichbauer has 30 years of experience in the machine tool industry. He began his career as an apprentice with the Sheffield Corp., now a division of Bendix Corp. In 1968 he was named general sales manager and later, director of marketing for Bendix.

William Liliey III, former minority staff director of the Committee on the Budget, U.S. House of Representatives, has been elected vice president of government affairs of American Express Co.

Prior to serving as minority staff director, Lilley was deputy director of the Council on Wage and Price Stability in the Ford administration. He is a former deputy assistant secretary of the U.S. Department of Housing and Urban Development.

Former Iowa governor Norman A. Erbe has been named executive vice president of the 12,500 member Associated Builders and Contractors Inc.

Erbe was governor of Iowa from 1961-63 and served as regional representative of the Secretary of the U.S. Department of Transportation. He served for over three years, by presidential appointment, as Chairman of the Federal Regional Council in Chicago.

Ray Sofield, president of Ray Sofield Inc., electrical contractors of Crofton, Md., has been elected national vice president of the Associated Independent Electrical Contractors Association.