President Bush yesterday selected new U.S. ambassadors for Uruguay and Mozambique.

Bush announced his intention to nominate Richard C. Brown, 50, a career diplomat, to the South American post.

Brown is special adviser for international security at the Defense Department and is a former deputy chief of mission at the American Embassy in Montevideo, Uruguay. He would succeed Malcolm Richard Wilkey.

Bush announced he would nominate career diplomat Townsend B. Friedman Jr., 50, as ambassador to Mozambique, succeeding Melissa Foelsch Wells. Since 1987, Friedman has served as director of Southern European affairs at the State Department.

At the Drug Enforcement Administration, a series of senior-level personnel moves are preceding the arrival of U.S. District Judge Robert Bonner, who will become DEA administrator following his expected confirmation by the Senate.

Stephen H. Greene is replacing David Westrate as assistant administrator for operations. This places Greene, who has been Westrate's deputy, in one of the agency's most sensitive posts -- in charge of overseeing all of DEA's domestic and overseas investigations.

Westrate becomes the new assistant administrator for planning and inspections, replacing Peter F. Gruden, who becomes the special agent in charge of the Washington field office. Ron Caffrey, who has been special agent in Washington, takes Greene's old job as deputy chief of operations.