REFERENCE
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| AAE Engineering | August Thaitech | Bechtel | Bismarck Metal | Best performance |
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| Best Tech & Engineering | Black & Veatch | Central Plaza | CES. engineering | Chevron |
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| CR Industrial | CUEL | Electricity | Enercon Engineering | Eversendai |
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| Experteam | Exterran | Getabec | Taikisha | Insultec International |
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| IRPC | Jardine | Kaefer | LS engineering | Mabudala Petroleum |
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| Marubeni | Maxens | McConnell Dowell | Multiphase Oil & Gas | No Ceiling |
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| Ophir | Polytechnology | PTT plc | PTTEP | Power Line |
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| Qualitech Engineering | Sawatudom Engineering | SCG | SCG Cement | Shipshape Sea Store |
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| Sirin Engineering | SPIE | Sumitomo Shi FW | Tantawan Construction | Technip |
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| Thai Jurong | Thomasmade | Thai Shinryo | Unity Engineering | Unithai |
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| Vicchi | Visavakit Patina | Vinythai | Siamraj public | YJ service |