OBAYASHI CORPORATION
General, building, civil, mechanical & electrical engineering contractor.
OBAYASHI SINGAPORE PTE LTD
General contractors (building construction including major upgrading works).
OES CONSTRUCTION PTE LTD
Building construction & wholesale construction materials.
OHIN CONSTRUCTION CO PTE LTD
Civil engineering contractor.
OKH HOLDINGS PTE LTD
General contractors.
OXLEY JV PTE LTD