Dong-Ah Geological Engineering

Dong-Ah Geological Engineering is a Korean civil-engineering contractor that stabilises and prepares ground for construction, work that includes soil improvement, underground diaphragm walls, mechanised tunnel boring, and conventional drilling and grouting.

Its clients are broadly public and private project owners who need specialist ground-engineering services before and during major infrastructure builds. Listed on KOSPI, Korea's main stock exchange, the company covers the full cycle from ground investigation and testing through design and construction, which it describes as its core competitive capability.