Korra commenced activities as Quantity Surveyors and Cost Engineers in January 1977 under the style of PT. Korra Inconserve and, subsequently, as PT. Korra Antarbuana. The key personnel in PT Korra Antarbuana are Ir. Wisnu Wardoyo, David Arrowsmith BSc. FRICS, ACI Arb, Ir. Osvinal Chandra.

PT. Korra Antarbuana is now the primary entity to render professional consultancy services on a vast range of construction projects, including buildings, civil engineering, industrial, infrastructure and major highway projects in the fields of: