The retirements of two key District of Columbia officials were disclosed yesterday as outgoing Mayor Walter E. Washington took the first official steps toward the transfer of power to Mayor-elect Marion Barry.

Retiring after long public careers are George R. Rodericks, 62, director of the Office of Emergency Preparedness, and Carl H. McIntyre, 57, director of campaign finance for the Board of Elections and Ethics. Although unrelated to the elections, their retirements bring to seven the number of already-vacant top jobs Barry will have to fill.

In another action, the mayor designated Gladys W. Mack as acting budget director, temporarily replacing Comer S. Coppie, who leaves Friday for a job in New York. Mack is now deputy director for budget operations.

Word of Rodericks' and McIntyre's retirements came as Mayor Washington issued an 11-page directive telling his department heads to prepare documents informing Barry's transition team of the status of city programs.

Each agency, the mayor wrote, should "identify the most pressing concerns and problems it faces . . . and the approach and timetable for developing the solutions . . ."

Washington appointed Judith Rogers, his special assistant for legislation, as his transition coordinator.

McIntyre, the campaign finance director, already has retired as a result of a poor health, the board was informed yesterday. He had held the post since the start of home rule in 1975 and previously was an assistant corporation counsel.

Rodericks, a city employe since 1957 and head of civil defense and related operations since 1968, said he will leave office Dec. 31. He said he informed the mayor of his decision before the Sept. 12 primary election.

In addition to the posts being vacated by Coppie, McIntyre and Rodericks, the incoming mayor must appoint a new head of the Board of Elections, a corporation counsel, an insurance superintendent and a director of the D.C. Department of Labor. These posts are vacant because of resignations, a death and a departmental reorganization.