Speak one voice of peace, forgiveness and reconciliation to implement peace agreement, says the newly sworn in acting Secretary-General.
Jemma Nunu Kumba says SPLM at all levels should work for unity and multi-party democracy, Radio Bakhita reports.
She believes her appointment is a call to serve in maintaining the vision of one people, one nation.
Pagan Amum Okiech was the longest serving SPLM Secretary-General since 2005.
He is currently in exile, leading a group of SPLM former detainees.