Seoul Metro Line 9 Phase 4 Extension (C2)

Seoul Subway Line 8 Extension (Byeollae C6)

Seoul Subway Line 4 Extension (Jinjeop C3)

DX Line (Shinbundang) Northern Extension

Great Train Express (GTX) for Metropolitan Area

Seoul Subway Line 9 (C921)

Busan Subway Line 1 Extension (C4)

Seoul Subway Line 9 (C915)

Seoul Subway Line 9 (C917)

Daegu Subway Line 2 Gyeongsan Extention (C2-1)

Seoul Subway Line 7 Extention
(Onsu~Bupyeong-gu office ) (C701)

Seoul Subway Line 9 (C902) (Structure)

Seoul Subway Line 9 (C911)
(Redesign of vertical vent)

Seoul Subway Line 9 (C910) (Redesign)

Seoul Subway Line 3 Extention (C301)

Seoul Subway Line 9 (C911) (Vents of 918)

Seoul Subway Line 9 (C902)
(Temporary retaining structure & tunnel)

Bundang Line Wangsimni ~ Seonreung (C3) (Roadbed)

Seoul Subway Line 9 (C914)

Seoul Subway Line 9 (C902)

Busan Subway Line2 (C230)
(Suyeong-gang riverbed tunnel)