President Carter is nominating Benjamin H. Read, former excutive secretary of the State Department to be deputy under secretary of state for management the White House announced yesterday.

The vancancy was created when Richard M. Moose became assistant secretary of state for African affairs. An attempt to replace Moose with Frank C. Carlucci, U.S. ambassador to Portugal, encountered Democratic opposition in Congress because of Carlucci's work for the Nixon administration.

Read, 51, is president of the German Marshall Fund of the United States, a Washington-based foundation for broadening American-European understanding. He has known Secretary of State Cyrus R. Vance for some years, a spokesman said.

He was legislative assistant to former Sen. Joseph S. Clark (D-Pa.) from 1958 to 1963, then joined the State Department as special assistant to Secretary of State Dean Rusk and as excutive secretary from 1963 to 1969.

From 1969 to 1973 Read was director of the Woodrow Wilson International Center for Scholars.

Carter also nominated Simeon M. Bright, 51, of Keyser, W.Va. - a Post Office specialist from 1962 to 1969 and now head of a real estate and investment firm - to be a member of the Postal Commisssion. He would replace Paul A. Miltch.