Company history

The beginnings of oil exploration and production in our country reach as far back as 1883, when the first oil refinery in Rijeka was put in operation and 1932, when the oil production in Gojlo began.

Since that time, up to the present day, experience in maintenance, modernisation and construction of oil processing facilities and equipment, and oil exploration and production facilities has been gained and broadened. All this experience has been integrated into STSI.

In the process of restructuring of INA - Industrija nafte d.d. through the integration of all INA’s resources in 1998, an independent organisational unit under the name STSI - INA Technical Services Sector was established.

In 2001, INA founded a limited liability company, STSI – Integrated Technical Services Ltd., with the headquarters in Zagreb, registered with the Commercial Court in Zagreb on 20 December 2001.