GRRS or Global Reliable Resources Services is one hundred percent nationally owned by former team members of the Reliability Services Section of the Fixed Plant Maintenance Department of Ok Tedi Mining Limited which operates in the Western Province of Papua New Guinea. GRRS specialises in asset maintenance management and engineering.

GRRS operates out of Port Moresby, the capital city of Papua New Guinea. As the company extend its operations further it is expect to move its offices to on-site mining and petroleum project areas and provincial capitals where vital government utilities are located