1. STS Corporation Co., Ltd.
196/8-12 Soi Pradipat 14, Pradipat Road, Phayathai, Phayathai, Bangkok 10400

02-270-8899 
https://www.sts.co.th


1.1  Geotechnical Services Business Unit / Field Density Test 
      Ms.laong P.
      02-270-8899  Ext. 311, 063-203-7454
      Fax : 02-279-3422
      Email : [email protected] , [email protected]
 
1.2  Quality Assurance Business Unit
      Mr. Charoen I.
      02-270-8899  Ext. 511-515, 086-342-9531
      Fax : 02-279-8507
      Email : [email protected]

1.3  Pile Testing Business Unit
      Mr. Thanabat U.
      02-270-8899 Ext. 512, 513, 518, 520, 521
      Fax : 02-158-0198
      Email : [email protected] 

1.4  Geotechnical Instrumentation Business Unit
      Mr. Anan O.
      02-270-8899  Ext. 252, 081-817-8847
      Fax: 02-271-0020
      Email : [email protected]

1.5  Civil Work Monitoring Business Unit
      Mr. Chalit I.
      02-270-8899 Ext. 545, 061-014-8936
      Fax : 02-278-1178
      Email : [email protected]

1.6  Infrastructure Survey and Testing Business Unit
      Mr. Napassapong J.
      02-270-8899 Ext. 505, 506, 086-342-9532
      Fax : 02-279-8507
      Email : [email protected]

1.7  Structural Testing and Assessment Business Unit
      Mr. Chulaseth K.
      02-270-8899 Ext. 503, 509, 086-342-9536
      Fax : 02-279-8507
      Email : [email protected]
Pile Testing Business Unit
​
570 Thetsaban Nimitnuea Rd., Lad Yao, Chatuchak, Bangkok, 10900
2.  STS Engineering Consultants Co., Ltd.

196/10-12 Soi Pradipat 14, Pradipat Road, Phayathai, Phayathai, Bangkok 10400
02-270-8899
Fax : 02-271-0020
https://www.sts.co.th

2.1  Engineering Design Division
Mr. Unnop T.
02-270-8899  Ext. 401,412-413
Fax : 02-279-8170
Email : [email protected]

2.2  Survey IT and GIS Division
Mr. Unnop T.
02-270-8899  Ext. 401,412,413,422
Fax : 02-279-8170 
Email : [email protected]

2.3  Construction Management Division
Mr. Pumin S.
02-270-8899  Ext. 402-403
Fax : 02-279-8170
Email : [email protected] , [email protected]
3.  STS Green Co.,Ltd.

3/23 3/23 Moo 5, Lat Sawai, Lum Luk Ka, Pathum Thani 12150 Thailand
02-106-2514
Fax : 02-106-2513
https://www.sts.co.th

3.1  Environmental Services Division
Mr. Suwat B.
02-106-2514
Fax : 02-1062513
Email : [email protected]
4.  Soil Testing Siam Co., Ltd. 

71/7-8 Kaset-Navamin Road, Jarakae Bua, Ladprao, Bangkok 10230
02-907 4820
Fax : 02-907 4821
http://www.soiltest.co.th

4.1 Testing Equipment Supply
Mr. Parnu S.
02-907-4820 
Fax : 02-907-4821
Email : [email protected]