Dong-Ah Geological Engineering Co., Ltd. was established in 1971 and has been engaged in specialized civil engineering construction for over half a century. It provides total services encompassing ground investigation, design, and construction, and possesses unique technological capabilities, especially in the fields of Tunnel Boring Machine (TBM) and Deep Cement Mixing (DCM) ground improvement.

"Dong-Ah Geological Engineering is a construction company that has specialized in research and construction related to soil since 1971, contributing to the establishment of national infrastructure for over half a century. It has also solidified its position in Southeast Asia and the Middle East, including Singapore and Hong Kong, with specialized technology and diligence, pursuing the goal of being 'the world's best in soil' through continuous technological development and innovation."

Business Areas

• Mechanical Tunnel (TBM) Business: This is a core business area that involves constructing tunnels using a giant cylindrical excavation machine called TBM (Tunnel Boring Machine). It is suitable for urban construction due to less noise and vibration, and is used in various infrastructure constructions such as undersea tunnels, subways, and power conduits.
• Ground Improvement (DCM) and Foundation Works: This business area includes soft ground improvement, diaphragm walls, and foundation works. Based on our total service capability, which provides ground investigation, testing, measurement, design, and construction simultaneously, we offer economical and stable ground solutions.
• Engineering and General Civil Works: We provide engineering services including establishing investigation plans, field surveys, tests, and laboratory tests required for design, as well as identifying topographical and geological characteristics. We also perform general civil engineering construction work such as roads and railways.

Products

• TBM (Tunnel Boring Machine) Tunnel Construction: This service involves excavating underground spaces using TBM, an advanced automated machine, and simultaneously assembling tunnel walls to complete the tunnel. It is safe, environmentally friendly, and allows for precise construction, providing an optimized solution for infrastructure construction in complex urban areas and underwater sections.
• Ground Improvement Methods (DCM, DVS, etc.): We provide various ground improvement methods to strengthen and stabilize soft ground. Technologies such as DCM (Deep Cement Mixing) and DVS (Dynamic Vertical Drain System) are applied to large-scale ground projects like ports and landfills.
• Boring and Grouting Works: This involves drilling holes in the ground (boring) and injecting special materials (grouting) to reinforce or waterproof the ground. It is utilized as an essential foundation method for various civil engineering works such as tunnels, underground structures, and dams.

Special Notes

• Unique Technology and Know-how: Based on unique technology and construction know-how accumulated over half a century, we lead the domestic market in TBM and ground improvement fields. In particular, we hold the largest number of large-diameter shield equipment in Korea, enjoying a dominant position.
• Total Service Provision Capability: We possess 'total service' capability, providing ground investigation, testing, measurement, design, and construction simultaneously, as a core competitive factor. This allows us to offer economical and stable design and construction to our clients.
• Overseas Market Competitiveness and Localization of TBM Equipment: We have successfully executed large-scale overseas projects in Singapore, Hong Kong, and other regions, proving our global competitiveness. Recently, we succeeded in manufacturing TBM equipment in-house, enhancing technological independence and strengthening cost competitiveness.

Recruitment Information

• Main Hiring Positions: We primarily recruit for positions in civil engineering construction, safety management, engineering (geotechnical design, underground safety assessment), plant (equipment procurement and maintenance), accounting/finance, HR/general affairs, and IT.
• Benefits: We provide benefits such as children's tuition fees (university), holiday gifts, operation of an employee association, self-development support (language, certifications), congratulatory/condolence payments and leave, selective welfare system, support for comprehensive health check-up fees, resorts, and relocation expenses.

💡 A Word from JobPloy
Dong-Ah Geological Engineering Co., Ltd. is a specialized construction company in the civil engineering and geotechnical fields, with outstanding technology in tunnel construction and ground improvement. Since roles such as field construction, engineering, and safety management are common, acquiring relevant technical skills and gaining field experience is crucial. There are also opportunities to participate in overseas projects, so developing global competencies is beneficial. Due to the nature of construction site work, adherence to safety rules and teamwork are very important, and consistent self-development to strengthen expertise will lead to good results.