- 2020
- 07Registered as Hanwha Chemicals civil-architectural partner company
- 2019
- 10Civil engineering business [NO. 150864]
- 2018
-
- 12Steel structure [Yeosu 2018-18-01]
- 12Firefighting facility construction business [NO. 2018-02-00537]
- 2016
-
- 10Construction business registration [NO. 150626]
- 03Gas facility construction business type 1 [Yeosu 2016-23-02]
- 2014
-
- 10Construction Work Registration [No. 150626]
- 08KOSHA18001 Certification
- 2013
- 11Registered as Hanwha Chemicals civil-architectural partner company
- 2011
- 11Registered as Cheil Industries machinery/piping/wiring partner company
- 2006
- 04Transferred Ilsung office
- 2005
-
- 10Registered as LG Petrochemical Co. Yeosu Plant partner company
- 06Registered as Dongbu Steel Co., Ltd. construction repair company
- 04Registered ISO9001 Certification
- 2004
- 10Registered as mechanical equipment construction business [2004-12-06]
- 2003
-
- 11Registered Metal Structure-Changho Construction work
- 05Registered as DRB Co., Ltd. CONVEYOR SYSTEM partner company
- 04Developed SCREEN Take-Up [Patent 2000-4652] /li>
- 04Selected as BHA U.S.A technology transfer company [Dust collector]
- 03Registered for Samnam Petrochemical and other construction repair companies
- 2002
-
- 07Registered as Hyundai Hysco, Namhae Chemical, KCC partner company
- 03Registered for LG Kumho Petrochemical, Kumho Polychem, Kumho P&B, Kumho Mitzui construction
- 02Registered as LG Chemical Steels and Mechanical Device Repair Business
- 2001
- 03Registered as Facility Maintenance Management Company [2001-29-01]
- 1999
- 06Completed construction for Ilsung Plant
- 04Established Ilsung Co., Ltd.