The National Black U.S. Marshals Organization will oppose President Carter's nomination of J. Jerome Bullock as the new U.S. marshal for the District of Columbia, the chairman of the marshals organization, Wallace Roney, said yesterday.

Roney, who is a deputy U.S. marshal here, said the organization wants the post filled by promotion from within the marshals' ranks rather than by bringing in someone from outside the D.C. marshal's office. The appointment is subject to Senate confirmation.

Bullock, 29, is a Georgia-born lawyer who has served since last year in the office of the legal counsel of the U.S. Marshals Service national headquarters here. The service is part of the Justice Department.

Neither the White House nor the Justice Department would comment on Roney's statement.

Neither the White House nor the Justice Department would comment on Roney's statement.

Roney did not make any accusations against Bullock personally, but said he feared Bullock is too young and inexperienced for the job of supervising 250 deputies and would be a "figurehead." He said his organization urged the appointment of Raymond Miller or Donald Smith, both assistant chief deputies, as the successor to George K. McKinney, the current marshal.