09.

Optimal
Energy Service Co., Ltd. (OES) (registration number: 220015.220016)​

08.

ISO
9001:2015 quality management system certification registration​

11.

 Korea Hydro & Nuclear Power Co., Ltd. registered as a qualified person
(Registration No.: 201801375)​

07.

Becoming a member of Korea Automatic Control IND. Cooperative.​

01.

Relocating in the new company buiding​

01.

Incorporating a electrical construction business license​

01.

Confirming ISO 9001:2000 & KSA 9001:2001​

01.

​Acquiring a electrical construction business license​

01.

Setting up the DAEYANG ENG​