Marius Jonker (born 19 June 1968 in Kimberley, Northern Cape)[1] is a South African rugby union Television Match Official and former referee.
[2] In September 1994, he moved to Richards Bay to take up employment with Bell Equipment, and played rugby for North Coast Rhinos of Empangeni in Zululand.
[4] In August 2005, he made his international debut when he was in charge of a Rugby World Cup qualifying match between Uganda and Zimbabwe in Kampala.
[1] In June 2006 he refereed the Pacific Nations Cup match between the Junior all Blacks and Samoa and the mid-year international between Fiji and Italy.
Jonker was placed third on merit in South Africa's 12-man panel of national referees in November 2008, behind Jonathan Kaplan and Mark Lawrence.