| Local Firms | |||
| • Arun Chaiseri Consulting Engineers Co., Ltd. | • Infinity Services Co., Ltd. | ||
| • Architects 110 Co., Ltd. | • Lanna Engineering Consultants Co., Ltd. | ||
| • Asian Engineering Consultants Corp.Ltd. | • Pal consultants Co., Ltd. | ||
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• Asian Consultant and Technology Co., Ltd. | • P.C.B. Technology Co., Ltd. | |
| • A.S.C. Consultant Co., Ltd. | • Plan Architect Co., Ltd. | ||
| • Capable Co., Ltd. | • Project Planning Services Co., Ltd. | ||
| • Chuchawal-De Weger International Co., Ltd. | • P.U. Associates co., Ltd. | ||
| • Creative Technology Co., Ltd. | • Resource Engineering Consultants Co., Ltd. | ||
| • Design Consultants Co., ltd. | • Sea Consult Engineering Co., Ltd. | ||
| • Din 4 Company Ltd. | • S.N.B. Consultant Co., Ltd. | ||
| • Dhara Consultants Co., Ltd. | • Systems Engineering Co., Ltd. | ||
| • Environmental Engineering Consultants Co., Ltd. | • Team Consulting Engineers Co., Ltd. | ||
| • Epsilon Co., Ltd. | • Thai Engineering Consultants Co., Ltd. | ||
| • Februar Group Co., Ltd. | • Time Architect & Associates Co., Ltd. | ||
| • First Floor Architect Co., Ltd. | • Uthai Consultant Co., Ltd. | ||
| • Index International Group co., Ltd. | |||
Expatriate Firms• Alfred Mok, Hongkong• Barry Arnold Associates Ltd., Singapore & USA. • Callison Inc. USA. • Electrowatt Engineering Ltd., Switzerland. • Jeruis B. Webb Company, USA. • Lahmeyer International GmbH, Germany
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• Mott Mac. Donald, UK.
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