He started career in petrochemicals and petroleum research in South Africa . Was core member of team that created Billiton 's aaluminumbusiness . He has been Chief Executive Officer of BHP Billiton since October 2007 .
He began career in petrochemicals and materials research in South Africa . Was core member of team that created Billiton 's aaluminumbusiness . He has been Chief Executive Officer of BHP Billiton since October 2007 .