August 15, 2016, On April 3, 2015 Dr. Costello Garang Ring Lual was nominated to the post of president of the governing body of the Sudd Oil Company by the chairman of the SPLM/SPLA Riek Machar Teny on 3rd. of April 2015. However, Costello Garang was working behind the sense reporting all activities of SPLM-IO both in Pagak and Khartoum
Costello Garang Ring Lual is a South Sudanese politician. He was born in the town of Aweil in Bahr el-Ghazal, which is part of the present Lol State. Like many Dinkas, he was send to monitor Dr. Riek’s activities while residing in Germany.
Costello Garang has held numerous posts in the Sudan Peoples’ Liberation Movement/Army (SPLM/A) since its formation in 1983, as well as being Chairman of the New Sudan Foundation and the White Nile Foundation. For the latter, he has been particularly active in the fields of international co-operation and economic development.