Pastor Nyaniso James Siwani passed away on April 15, 2017. He was General Secretary of the South Africa Conference when they joined the SDB World Federation in 1986. He was delegate to the WF Sessions in 1986 in the United States, 1992 in New Zealand, 1997 in Jamaica, and 2003 in Brazil, serving as WF Vice President for Africa 1997-2008 and attending the Full Executive Committee meeting in 2005 in Michigan, US. In that role he published several issues of a newsletter Voice of Africa which promoted organization of the SDB Africa General Conference and reported on its four meetings (1992, 1994, 1996, and 2001).
A short biography is included in his book, The Unknown Made Known: A History of Sabbathkeepers in South Africa, published jointly by the South Africa SDB Conference and the SDB Historical Society in 2005.