Johannesburg - Zingiswa Losi was on Tuesday nominated unopposed for the leading position of president of the Congress of South African Trade Unions.
Bheki Ntshalintshali stays as Cosatu general-secretary, and Solly Phetoe as his deputy.
Losi will be the first woman to lead the trade union federation which is holding its 13th national congress in Midrand in Gauteng.
Outgoing Cosatu president Sdumo Dlamini had announced that the elections agency will announce the name of the new office bearers.
Later Tuesday, the general-secretary of the South African Communist Party (SACP), Blade Nzimande is expected to address delegates.
Cosatu and the SACP, together with the ruling African National Congress (ANC), make up the tripartite alliance.
African News Agency/ANA