Bangkok Head Office
Tel. +66 (0) 2444 3645 (automatic 15 lines), +66 (0) 2809 3261 (automatic 8 lines)
Fax. +66 (0) 2444 3026_7, 0 2809 3276_7
Email info@siwatesting.com
Rayong Branch Office
68/68 Thoet Thai-Muslim Road, Maptaphut, Amphur Muang, Rayong 21150, Thailand
Tel. +66 (0) 3801 4100 (10 lines)