[3] He was speaker of the National Legislative Assembly from 2011 to 2013[4] and secretary general of the Sudan People's Liberation Movement.

In 1993, he accompanied Garang to Nairobi for a peacemaking seminar in June and to Kampala for an IGAD-mediated dialogue with the Nasir faction.

[12] Igga had known Lam Akol, one of the Nasir leaders, since their time together in the Cuban training camp.

[8] As chairman of the SPLM Political Affairs Commission, Igga established the Technical Committee of Intellectuals in February 2000.

[13] Following the 2005 signing of the Comprehensive Peace Agreement establishing the autonomy of Southern Sudan, Igga was in charge of changing the SPLM from an insurgent strategic leadership to a political party.