The Small Business Administration last week honored two businessmen, one from Virginia Beach and the other from Fort Washington, Md., in a week of awards and ceremonies designed to promote the entrepreneurial spirit.

Lawrence C. Abell, president of FEDCO Systems Inc. in Fort Washington, was named Maryland small business person of the year. FEDCO Systems is a full-service design firm that brings architects, engineers, planners and construction managers together under one roof. "The concept offers several advantages and saves the cost of back-and-forth negotiating between different firms," the SBA said.

Abell joined FSI in 1976 and became its owner in 1980; since then the company has doubled its size and has participated in building projects ranging from a bowling center in Crofton to a waterfront community in Oxon Hill to a facility for the Georgetown University Community Health Plan. Abell has lobbied for small business in the state legislature, the SBA said, and was chairman of the Maryland Chamber of Commerce's small business council for the past three years.

The SBA honored R. Alan Fuentes, founder and president of Computer Dynamics Inc. of Virginia Beach, as Virginia's small business person of the year.

Fuentes formed CDI in 1979 with two employes, developing and enhancing computer software for small government purchase orders. Since then, the company has been riding a wave of demand in the specialized software market, and has nearly doubled its sales every year, ending 1984 with about $5.5 million in revenue. It now has operations in 15 states; a staff of 430 computer specialists handle about 20 commercial and 15 government accounts, mostly designing management information systems.

The Washington honoree, named earlier this month, was Marion O. Greene, founder and chairman of International Business Services Inc., a management and technical consulting firm. The three men participated in a competition for national Small Business Person of the Year, won this year by the founder of a Nebraska scientific instrument firm. COMMUNICATIONS

Scott Richardson, press secretary to Senate Majority Leader Robert Dole (R-Kan.), will join Aker Associates Inc., a 2-year-old Washington public relations firm, later this month. Richardson, a 1979 graduate of the University of Kansas who has been with Dole for about six years, will supervise media and editorial services for the firm, which is headed by Colburn Aker.

Burson-Marsteller, the country's largest public relations firm, has tapped Larry E. Smith, the U.S. Senate's sergeant at arms, as vice president of its new government relations unit. As sergeant at arms, Smith supervised about 1,600 Senate employes and acted as counsel to Senate Majority Leader Dole.

Ehrlich-Manes & Associates, a Washington public relations firm, has promoted Lee Blom to vice president for creative services and named him a member of the agency's management board. He was formerly creative director.

Needham Harper Worldwide has assigned Joseph P. Landy, an executive vice president and formerly director of client services in New York, to its Washington office as general manager. Landy formerly taught marketing at Georgetown University's School of Business and was Mobil Corp.'s advertising manager for the U.S. before joining the advertising firm in 1982.

Miles River Press in Alexandria has appointed Vivian Harquail assistant to the president for business development. Harquail, formerly program coordinator for the Smithsonian's Chesapeake Research Center, will supervise marketing for the firm and for two associated companies, Educational Challenges, a textbook development company, and Community Challenges, a non-profit publishing firm for community organizations. At Educational Challenges, Philip Menzies, formerly with Reston Publishing Co. Inc., has been named editorial coordinator.

Space Communications Co., a joint venture between Continental Telecom Inc. and Fairchild Industries Inc., announced these recent appointments: Michael B. Magee to director of budgets and cost analysis, Gerald Draina to director of program control, Richard E. Rankin Jr. to director of risk management and taxes, and Jane R. Beckley to director of treasury operations.

Sue Byrnes, formerly senior vice president and director of government affairs at Ruder, Finn & Rotman, has joined Palumbo & Cerrell Inc., a Washington public affairs consulting firm, as vice president for public affairs. TRANSPORTATION

Michael F. Brimmer, since 1975 deputy director of the Federal City Council, a private organization of business and civic leaders dedicated to improving the city of Washington, has been named assistant vice president for corporate services at Chessies System Railroads, the unit of Richmond-based CSX Corp. that comprises the C & O Railway, the B & O Railroad and Western Maryland Railway. PROFESSIONAL SERVICES

Rex E. Lee, who has been solicitor general -- the government's chief lawyer before the Supreme Court -- since 1981, will join the firm of Sidley & Austin as a partner in its Washington office. "Lee will concentrate on appellate advocacy, with special emphasis on constitutional and Supreme Court practice," said H. Blair White, managing partner at the law firm.

First Washington Associates, an international consulting firm, has appointed Anthony R. Perram, formerly financial advisor to the World Bank's industry department, to vice president and secretary of the Rosslyn firm.