Citizens Savings and Loan Association, Inc., of Silver Spring has given chairman Frank L. Hewitt Jr. the additional post of chief executive officer and president Thomas H. Eminizer has been designed chief administrative officer.

Hewitt has been a board member for over 33 years and was elected chairman in 1974. Eminizer has been president of the S&L since 1975.

Citizens, with total assets of $220 million, has grown in recent years. In 1976, it acquired Suburbia Federal Savings and Loan Association, a move that brought the number of Citizens offices up to its present 16 in Montgomery, Prince George's, Frederick and Carroll countries.

LongEtronics Inc., of Springfield has named William K. Marrinan presient and a director of the company.

Current president and chairman Gordon O. F. Johnson will continue to serve as chariman and chief executive officer.

Marrinan most recently has been president of Terminal Communications, Inc., of Raleigh, N.C. From 1963 to 1976, he was with Control Data Corp., lastly as president of its Millelr Printing Machinery Co. of Pittsburgh.

The James T. Barnes Mortgage Co. of Washington has appointed John S. Frisby executive vice president. He will be responsible for the company's mortgage loan operations in the Washington area.

American Finance System, Inc., has persuaded Ron Graham to the newly-created position of senior vice president and director of supervision.

Scott W. Elkins has joined First & Merchants National Bank of Virginia as vice president. He will work in the Commercial lending and corporate services division of the bank.

Elkins brings 15 years of Northern Virginia banking experience with him to F&M, as he is former vice president and senior commercial lending officer of Clarendon Bank & Trust Co.

United Virginia Bank/National announced three promotions.

Executive vice president Joseph B. Murden Jr. has been named to head the bank's commercial division. He was head of the retail division.

John C. Harley, who also joined the bank in 1966, has been promoted to vice president of the sales and financne division.

The Washington Post has named Mary Ann Tortorello promotion manager. She has been creative services director for the past two years and prior to that headed her own advertising consulting firm in Columbia.

Her new assignment follows the resignation of promotion director Morton Pollack, who has accepted a position with CHS, Inc., in Los Angeles.

Dynalectron Corp. of McLean has elected David H. Jaquith to the board. Jaquith is chairman of Vega Industries, Inc., of Syracuse, N.Y.

Prince George's State Bank, a new minority-owned bank now in organization, announced the election of five new board members. They are: Alfred L. Black, president. Information Planning Associates of Rockville: Glifford Green, president, Minority Truckers, Inc., of Washington and Green Truckers of Prince George's County; Carl D. Jones, president, Jones & Artis, Inc., of Washington; Joseph C. McLaughlin, president of McLaughlin Oldsmobile, Inc., of Capitol Heights; and William B Sarvis, president, Central Avenue Supermarket of Washington.