QEC (ASIA) PTE LTD
SC2 PTE LTD
SGS INTERNATIONAL CERTIFICATION SERVICES SINGAPORE PTE LTD
SINGAPORE TEST SERVICES PTE LTD
SOCOTEC CERTIFICATION SINGAPORE PTE LTD
TQCSI CERTIFICATION PTE LTD
TRANSPACIFIC CERTIFICATIONS (SINGAPORE) PTE. LTD.
TÜV RHEINLAND SINGAPORE PTE LTD
TÜV SÜD PSB PTE LTD
UL INTERNATIONAL SINGAPORE PTE LTD