Perusahaan Asing

1. AHT Group Consultant, Jerman
2. CTI Engineering International Co., Ltd, Jepang
3. Nippon Koei Co., Ltd, Jepang
4. PCI (Pacific Consultant International), Jepang
5. West JEC inc, Jepang
6. China Water Resources Pearl River Planning Surveying & Design, China
7. Sinohydro Corporation Limited, China
8. Powerchina Huangdong Engineering Corporation Limited, China
9. Powerchina Beijing Engineering Corporation Limited, China
10. Egis BCEOM International, Prancis 
11. ELC Electroconsult. S.p.A. , Italia
12. Fichtner GmbH & Co, Ltd. , Jerman
13. Hydrochina International Engineering Co, Ltd. , China
14. J Power, Jepang
15. KRC - Korean Rural Community, Korea Selatan
16. PRPDSC (Pearl River Planning, Surveying and Designing) Co, Ltd. , China
17. China Sinclair Knight Merz, China
18. TEPSCO (Tokyo Electric Power Services) Co, Ltd. , Jepang
19. Yachiyo Engineering Co, Ltd. , China
20. Zhejiang Huadong Construction Engineering Co, Ltd. , China
21. Associated Consulting Engineers ACE (PVT) Ltd. , Pakistan

Perusahaan Nasional

1. Amythas 
2. Bina Karya (Persero)
3. Connusa Energindo
4. Darma Dedana Cipta (DDC)
5. Indra Karya (Persero)
6. Kwarsa Hexagon
7. Mitra Lingkungan Dinamika (MLD)
8. Virama Karya (Persero)
9. Wiranta Buana Raya
10. Wiratman & Ass.
11. Kayan Hydropower Nusantara (KHN)
12. Etc