A federal judge in Alexandria yesterday sentenced a former official of the U.S. Agency for International Development (AID) to prison and fined him $5,000 for taking bribes while directing an aid program for the Nicaraguan contras.

During a 15-minute sentencing hearing, Donald F. Enos, 47, a former deputy director of AID, apologized for accepting $93,000 in bribes from George Kraus of Kraus International, a medical consulting firm that won $2.6 million in government contracts with Enos's help. U.S. District Judge Claude M. Hilton then imposed two one-year sentences for two counts of bribery. The sentences are to be served concurrently.

Enos pleaded guilty last March to giving Kraus confidential AID information and arranging for the New York company to win a $57,000 contract to study the administration of medical services to the Nicaraguan resistance in 1988 and 1989.

Hilton also ordered Enos to pay $1,040 in restitution to the federal government. Enos will be placed on two years of supervised release, once his term is served.

"Your honor, I know I have made some serious errors," Enos told Hilton. "I am extremely remorseful. I violated the trust of my co-workers. . . . I realize I am going to have to pay a debt."

Enos faced a maximum prison sentence of 30 years and fines up to $500,000. Yesterday, his attorney John J. Grimaldi II, in seeking leniency, portrayed Enos as a family man who was a diligent foreign service worker for most of his career. Enos, Grimaldi said, took bribes only after getting into financial difficulty.

"To ignore his exceptional foreign service would be a disservice," Grimaldi argued.

But, "he used that good record to abuse the government, to carry out his bribery scheme," countered James Cole, deputy chief of the Justice Department's Office of Public Integrity.

The probe of Enos was initiated in October 1988 after AID's Tegucigalpa, Honduras, investigative office received a tip alleging that Enos had been giving Kraus insider information about contracts and that Kraus helped Enos finance the purchase of a Panama condominium.

A federal probe of other AID employees who also dealt with Kraus is continuing, said Gene Richardson, AID assistant inspector general for investigations.