Marius Jacques Kloppers (born 26 August 1962) is a South African-born Australian businessman and former CEO of BHP Billiton, the world's largest mining company.
Kloppers graduated with a Bachelor of Chemical Engineering from the University of Pretoria and subsequently went on to receive a PhD at Massachusetts Institute of Technology.
Kloppers worked in petrochemicals at Sasol and materials research with Mintek in South Africa.
Following completion of his MBA at INSEAD, he then worked with management consultants McKinsey & Co in Netherlands before joining Billiton in 1993.
In 2007, at the age of 44, he was appointed CEO of the largest resource company in the world, BHP Billiton.