The Federal National Mortgage Association, in an effort to better coordinate the administrative functions of the congressionally chartered financial institution, has appointed Dale P. Riordan to the new post of executive vice president in charge of administration and corporate relations.

The appointment consolidates responsibility for corporate communications, investor and government relations, human resources and administration under one manager.

Riordan, a Baltimore native who has held several senior government posts, including special assistant to the secretary of Housing and Urban Development under the Carter administration and chief economist at the Federal Home Loan Bank Board, was most recently senior vice president for government relations at Fannie Mae.

The appointment makes Riordan one of five executive vice presidents of Fannie Mae. The others oversee finance, computer systems, mortgage operations and legal affairs.

In addition, Fannie Mae named two new vice presidents. Thomas A. Lawler, who joined the corporation in 1984 as director of financial economics, has become vice president for economics. He will have responsibility for analyzing and projecting major developments in the overall economy and in the financial and mortgage markets.

Patricia Redman Singletary, formerly director of human resources with the law firm of Wilmer, Cutler & Pickering, has become vice president for human resources.

Fannie Mae, a publicly owned stock corporation, replenishes supplies of home mortgage funds by buying the loans from primary lenders, such as thrift institutions and mortgage bankers. BANKING, FINANCIAL SERVICES

Chase Bank of Maryland, the subsidiary of Chase Manhattan Bank in New York that began operations in November with the purchase of three savings and loans, has appointed a new seven-member management team. The appointees, all named to the post of senior vice president, are: Paul H. Beatty, human resources; John M. Bond Jr., commercial banking; Christopher Y. Downs, consumer banking; Charles R. Falls, credit policy; Robert J. Mitchell, financial officer; Joan Neale Spermo, multi-family mortgage portfolio, and Lawrence W. Stirling, operations and systems.

D.C. National Bank announced promotions in its retail banking division: Evelyn Chiotakis Klund to vice president and manager of the main office and Sheila Noble, currently manager of the Connecticut Avenue office, to assistant vice president. In the accounting division, Paul M. Harbolick Jr. was promoted to assistant vice president and controller and Cheryl Carter was promoted to assistant cashier and manager of the funds department. Other promotions include: Linda D. Crandall to vice president for corporate services, Anne Lause to assistant cashier, Joyce Diggs to assistant vice president and senior auditor and Joanne McDowell to corporate secretary.

The Calvert Group, a Washington mutual fund management company, has promoted Wayne B. Bardsley to its key marketing post. As senior vice president for marketing and securities, Bardsley will direct all marketing efforts for the company. Catherine S. Bardsley, formerly associate counsel, has been promoted to general counsel, succeeding her husband. Aurora C. Tandberg, formerly with Calvert's parent company, The Acacia Group, has been promoted to national director of marketing. John A. Ways, an officer of Calvert Shareholders Services Inc., has been named manager of the company's computer system.

First American Bank of Washington has promoted John W. Duffy to vice president for the corporate banking division. Promoted to assistant vice president were: George H. Matthews, in corporate banking, and Joan Clemons and Barbara J. Olson, in the real estate division. Promoted to assistant cashier were: Kathleen A. Bruen, Douglas L. Cooper, Stacy P. Krogh and Catherine M. Wardynski.

Palmer National Bank has promoted Renee J. Ariens, who joined the Washington bank in 1984, to vice president in charge of retail banking. PROFESSIONAL SERVICES

Four lawyers representing the Washington-based health care practice of Memel, Jacobs, Pierno, Gersh & Ellsworth, a Los Angeles law firm, have been recruited by an Atlanta law firm. Larry Gage, former deputy assistant secretary for the Department of Health and Human Services, and Howard Newman, former president of the Darmouth-Hitchcock Medical Center, have been named partners in the Washington office of Powell, Goldstein, Frazer & Murphy. They will direct the firm's health care practice. Also joining the firm's health-care practice are Paul Danello in Atlanta and Alan Parver in Washington. Gage said the group was moving because of the Atlanta firm's strength in the areas of finance and public policy, noting also that they will join former government colleagues Stuart Eizenstat, chief domestic policy adviser under former president Carter, and Larry Simons, formerly assistant secretary for Housing and Urban Development.

General Business Services Inc., a small-business counseling firm in Rockville, has appointed Ronald S. Snow vice president in charge of the company's field operations group. He was formerly assistant vice president in charge of West Coast operations.

PNI, a San Francisco-based architecture company, has named Samuel P. Lewis regional sales manager in its Washington office, which the company opened last year. Lewis, a retired U.S. Marines captain, is a member of the Prince George's County Economic Development Council.

Pete Pappas, formerly marketing manager for Temporaries Inc.'s western region, has been appointed branch manager for three Washington offices of the national temporary help firm.

Grant Thornton, an international accounting firm formerly known as Alexander Grant, has named Jonathan Wallman head of the management consulting department of the firm's Washington office. He will have responsibility for financial management, data processing and executive search services.

Paul H. Schieber, executive director of the Public Housing Authorities Directors Association, will leave the national group next week to join the Washington law firm of Weiner, McCaffrey, Brodsky and Kaplan. HOTELS

John (J. T.) Kuhlman, a native Washingtonian who has held hotel management positions in Europe, Latin America and the United States, has been appointed general manager of the newly restored Willard Hotel on Pennsylvania Avenue, according to Intercontinental Hotels Corp., the property's management company. INSURANCE

Charter Corp., a Towson, Md., insurance firm, has named Dennis M. Doyle as its new president and chief operating officer. James E. Maynard Jr. has become executive vice president for sales, and Hamilton A. Schmidt has been promoted to executive vice president for marketing. All three executives were elected to the board of directors.

AVEMCO Corp., the Frederick aviation insurance company, has announced new appointments, including a new management team for its subsidiary, National Aviation Underwriters Inc. John F. Shettle Sr. was named chairman and chief executive officer of NAU, and George L. Harcum was elected president and chief operating officer. New vice presidents at AVEMCO Corp. include: Thomas H. Chero, legal department, John R. Yuska, finance department, and Dan L. Jonson, systems development and administration. Also Rick H. Bicknell was appointed sales manager for the east-central sales region.

United Services Life Insurance Co. has appointed retired U.S. Army generals John W. Vessey Jr., formerly chairman of the Joint Chiefs of Staff, and Robert G. Yerks, formerly the Army's deputy chief of staff, to its board of directors. COMMUNICATIONS

Gannett Co. Inc., the Rosslyn-based publisher of USA Today, has recruited Denis C. Beran as vice president and head of the advertising operations of its year-old international edition, USA Today International. Beran, formerly publishing director of Business Week International, will be based in New York.

MultiComm Telecommunications Corp., an Arlington company developing methods for transmitting data via satellite and FM radio frequencies, has announced two senior appointments. Bruce Goodman, formerly senior vice president and general counsel of Mutual Broadcasting System Inc., MultiComm's predecessor, has been named chief operating officer. Marilyn Mouly, formerly vice president for marketing at MCI Communications Corp.'s electronic mail division, has become vice president for sales and marketing.

Tyl Associates Inc., a McLean public relations and advertising firm, has appointed David R. Pilvelait vice president. Formerly a senior account executive, Pilvelait will become a member of the agency's management team. RETAIL, WHOLESALE TRADE

Duron Paints & Wallcoverings Inc. has promoted George Aman, manager of its Beltsville headquarters, to executive vice president with responsibility for implementing all senior-level management plans.