White House officials are expected to decide today or tomorrow whether to go along with a congressional proposal for a new retirement system for federal employes hired since 1984.

If the White House approves the preliminary version -- or at least, agrees not to block it -- Senate and House conferees will complete a final draft to go into effect next January.

If the White House were to reject the current version, however, 300,000 workers hired since 1984 would have an extra 5.7 percent taken from their paychecks starting Thursday to pay for coverage under the existing civil service pension plan.

For the past two years, new employes have paid only 1.3 percent for retirement coverage. Employes hired before 1984 contribute at least 7 percent.

The retirement system now being worked out would be mandatory for workers hired since 1984 and would cost 23 percent of payroll. That is more than the White House wants, but still less than the 25 percent cost of the current program.

The White House has been holding out for a plan approved earlier by the Senate that would have cost 21.9 percent of payroll. It would have eliminated some early-retirement benefits and reduced cost-of-living adjustments for future retirees.

The new system calls for combined benefits from Social Security, a modified civil service pension and earnings from an optional tax-deferred investment plan. Employes could put up to 10 percent of their salaries into the program, with the government contributing up to an additional 4 percent.

Contributions and earnings wouldn't be taxed until employes retired or withdrew the money. Workers who didn't participate would still have 1 percent of their salaries contributed by the government into the plan. People

Bruce Navarro has been named the Office of Personnel Management's assistant director for congressional relations. He had been with the Equal Employment Opportunity Commission and the Labor Department. Steve Ramp has been acting director since Robert E. Moffit moved over to be assistant director for compliance and investigations.

Clara Harrington, a printing analyst who has worked for 44 years for the Internal Revenue Service, is retiring this week after 51 years in government. Meetings

The Asian and Pacific American Federal Employees Council is having a training session May 8-10 at the Crowne Plaza Holiday Inn in Rockville. Speakers will include William Ouchi, author of "Theory Z Management" and Irene Natividad of the National Women's Political Caucus. Call Stephen Thom, 569-4641.

The Arlington chapter of the National Association of Retired Federal Employees will meet at 1 p.m. May 14 at the Culpeper Gardens Recreational Center. Call 528-1020. Jobs

Federal Deposit Insurance Corp. wants a cash management technician, GS 4 through 6. Applicants must have civil service status. Call Audrey King, 898-3878.

Internal Revenue Service has openings for agents, GS 5 through 11. To inquire about job openings in the District or Maryland, call 376-1345. For information about Virginia openings, call 756-6679.

The Naval Research Laboratory is looking for a GS 12 metallurgist. Call Rebecca Parish at 767-3030.

Federal Highway Administration in McLean wants clerk-typists, clerk-stenos and secretaries, GS 3 through 6. Applicants must have status or notice of rating. Call Maxine Shields, 426-0515.