| Customer | Name Works | Scope Of Work | Location | Working Period | Value (THB.) |
| GC Maintenance & Engineering Co., Ltd. | Steel Structure Package Process Building Ventilation Control Project | Steel Structure Package | GC Polyols | July 2021 ~ November 2021 | 10,000,000.00 |
| GC Maintenance & Engineering Co., Ltd. | Install Ethylene Liquid Line from ORP to existing Ethylene Liquid Line I-1 | Mechanical, Piping and Civil Work | PTTGC2 (Olefins I-1) | July 2021 ~ December 2021 | 6,950,000.00 |
| GC Maintenance & Engineering Co., Ltd. | Waste Storage Shelter and Odor Treatment W/H 102 at GC Polyols | Civil and Piping Work | GC Polyols | June 2021 ~ December 2021 | 8,000,000.00 |
| PTT Global Chemical Public Company Limited | Long Term Service for Project and Maintenance Construction Service for GC (Yearly Contract) | Mechanical and Maintenance Construction Service | PTTGC | April 2021 ~ March 2023 | 20,000,00.00 |
| GC Styrenics Company Limited | Long Term Service for Project and Maintenance Construction Service for GC Group and Subsidiary (Yearly Contract) | Mechanical and Maintenance Construction Service | GC Styrenics | April 2021 ~ March 2023 | 4,000,000.00 |
| Global Green Chemicals Public Company Limited | Long Term Service for Project and Maintenance Construction Service for GC Group and Subsidiary (Yearly Contract) | Mechanical and Maintenance Construction Service | Global Green Chemicals | April 2021 ~ March 2023 | 10,000,000.00 |
| Thai Fatty Alcohols Company Limited | Long Term Service for Project and Maintenance Construction Service for GC Group and Subsidiary (Yearly Contract) | Mechanical and Maintenance Construction Service | Thai Fatty Alcohols | April 2021 ~ March 2023 | 1,000,000.00 |
| GC Glycol Company Limited | Long Term Service for Project and Maintenance Construction Service for GC Group and Subsidiary (Yearly Contract) | Mechanical and Maintenance Construction Service | GC Glycol | April 2021 ~ March 2023 | 16,000,000.00 |
| PTT Phenol Company Limited | Long Term Service for Project and Maintenance Construction Service for GC Group and Subsidiary (Yearly Contract) | Mechanical and Maintenance Construction Service | PTT Phenol | April 2021 ~ March 2023 | 28,000,000.00 |
| GC Polyols Company Limited | Long Term Service for Project and Maintenance Construction Service for GC Group and Subsidiary (Yearly Contract) | Mechanical and Maintenance Construction Service | GC Polyols | April 2021 ~ March 2023 | 2,000,000.00 |
| GC Oxirance Company Limited | Long Term Service for Project and Maintenance Construction Service for GC Group and Subsidiary (Yearly Contract) | Mechanical and Maintenance Construction Service | GC Oxirance | April 2021 ~ March 2023 | 1,000,000.00 |
| Cheer you Construction (Thailand) Co., Ltd. | Steel Structure Fabrication and Installation QMB F7 Project | Steel Structure Fabrication and Installation QMB F7 Project | Ban Bueng District, Chonburi, Thailand | Januery 2021 ~ May 2021 | 238,000,000.00 |
| GC Maintenance & Engineering Co., Ltd. | HP Flare F-4601 Improve Pilot Ignition Reliability by FFG Installation Project | Mechanical, Piping, Civil, Tower lift and Scaffolding at GC11 | GC Branch 11 (GC11) | Januery 2021 ~ November 2021 | 15,954,820.00 |
| GC Maintenance & Engineering Co., Ltd. | Propane/LPG Feed Pipeline Modification for OMP Project | Civil, Structure, Piping Modification for OMP Project | GC Branch 2 (GC2) | Januery 2021 ~ April 2021 | 47,130,000.00 |