Seong-Gi served three years from 1973 in the Korean army as a foot soldier in GOP area. He was the martial art (Tae Kwon Do) instructor for the regiment.
His first job in his career was with the Korean Ship Research Institute in 1980, which he left when he decided to do postgraduate study in Newcastle University in England.
Following the award of MSc in 1981, he started working for the Emersion Cavitation Tunnel as a research associate until 1986, during which time he obtained a PhD degree.
Following this, Seong-Gi decided to switch his subject into high performance (parallel) computing. He remained in this field until the end of 1999.From the year 2000, he started full time teaching at the Marine College in South Shields and in 2007, he came to lecture at WMA where he is closer to his three children who are living in London.
He was the very first in early 1980s who satisfied the fully Non-Linear Free Surface Boundary Condition in Rankine Source distribution method of flow calculation around surface ships. His method of distributing sources on the disturbed water surface itself is still the most advanced way of simulating the ship waves. He obtained his PhD for this work.
Recently, he has been engaged in Ship Manoeuvring research to help WMA’s Manned Model Ship Handling Centre at Timsbury.
He is now restarting his research into ship hydrodynamics.