Thiess originally commenced operations in Indonesia in 1972 when it acquired a 50% in Petrosea.
[1] After Thiess was taken over by CSR in 1980, the overseas operations including Indonesia operations were sold to Leighton Contractors.
[2][3] Thiess re-entered the Indoneasian market when Thiess Contractors Indonesia was established in 1988 and, working in a joint venture with PT Mintekindo Utama Into, started undertaking mining activities.
[4] Its first major mining contract was awarded in March 1989 by BHP at Senakin Mine in East Kalimantan.
[5] Thiess Pty Ltd hold a 99% shareholding in Thiess Contractors Indonesia.