Designed and developed various optical transmission and access networks as a network engineer. Major achievements include the rearchitecting of the nationwide optical transmission network using the MPLS-TP technology, development of new high-speed FTTH service by optimizing the G.fast technology, and modernization of NURO's optical network architecture leveraging OOLS technology to enable speedy capacity upgrade and lower latency. Exploring emerging advanced optical networking technologies in the network service business, developing the next-generation network architecture with the best mix of the latest technologies to meet new challenging demands from advanced applications of today and tomorrow.