In 1965, Dr. Wani Igga worked as a Anya Nya one Scout. In 1967-1968, he worked in Flanned Factory Co. Ltd, as Operator. In 1969 he worked in Bata Shoe Co. Ltd as Operator. In 1970, he was elected as the Chairman of Christian Student (YCS) Association. In 1972-1974, Dr.Wanni Igga was elected into the Rumbek Secondary School Student Union (SOSSA). In 1987-1992 he was the SPLM/A Zonal Commander of Central and Western Equatoria. In 1992-1994, he was appointed as the SPLA Chief of Operations. In 1994-2005, he became the SPLA Secretary General and Secretary of Finance and Economic Development. In 2002 to date, he has been serving as the SPLM Deputy Chairman. In 2005-2013, he served as the Speaker of South Sudan Legislative Assembly (SSLA). In December 2013, go date, he is serving as a Vice President of the Republic of South Sudan, for Economic Cluster.
Dr. Wanni Igga is also an author with multiple books published under his name. In addition, he completed Master’s Degree in Transformational Leadership and Change from the University of Greenwich, United Kingdom. On the 29th of March, 2017, he graduated and achieved a PhD in Bulacan State University, Philippines. On the 12th of June, 2019, he received an award on Sustainable Peace and Development from the council in India. Because of having written various books and scholarly articles, the University of Juba appointing committee awarded him with the title of Professor. Thus, Generalship and Professorship being a rare commodity.