OBAYASHI CORPORATION (OVERSEAS BUSINESS DIVISION)
OBAYASHI CORPORATION PRIVATE LIMITED
OCEAN ENTERPRISE (INT) PTE LTD
OCEANIC OFFSHORE ENGINEERING PTE LTD
OCEANMASTER ENGINEERING PTE LTD
O'CONNOR'S SINGAPORE PTE LTD
OCS FACILITIES MANAGEMENT SINGAPORE PTE LTD
ODYSSEY TECHNICAL SOLUTIONS SINGAPORE PTE LTD
OGSP ENGINEERING PTE LTD
OHMZ AND ASSOCIATES
Scope:Mechanical and electrical consultancy, green building services and energy auditservices.