Najib Razak returned to Malaysia in 1974 .
Najib Razak entered the business world , serving briefly in Bank Negara Malaysia and later with Petronas ( Malaysia 's national oil company ) as a public affairs manager .
Najib Razak returned to Malaysia in 1974 and entered the business world , serving briefly in Bank Negara Malaysia and later with Petronas ( Malaysia 's national oil company ) as a public affairs manager .