Jinyoung Jung joined Lee & Ko in 1995 and has been practicing in maritime, aviation, insurance, international commercial disputes and energy commodity for 25 years. He deserves competitive reputation in his practice areas from the clients as well as in the market.

Throughout his professional career, he has been involved in a number of major cases, including the 'MV Hebei Spirit vs Samsung Barge No 1' case, the 'Air China Aircraft Crash at Gimhae' case, the 'KAL Aircraft Crash at Guam' case and the 'Seizure by Somali pirate of MV Bright Ruby' case etc. He also represented many foreign/domestic clients (Hanjin Shipping, Korea Line Corporation, Britania P&I Club, Steamship Mutual P&I Club, North China Shipping, Korea Air Line, Thai Airways, Cathay Pacific, Korea Exchange Bank, Natixis Bank, Calyon Bank etc) in the area of maritime, aviation and commercial disputes.

Further, as the lead partner of energy group at Lee & Ko, he has been also advising major energy-related companies such as KOGAS, KEPCO, Korea District Heating Corporation, POSCO, Hyundai Steel and E1 Corporation etc with in-depth knowledge and experience in the energy commodity area. Especially he represented KOGAS in Sakhalin II LNG Project and in Mexico Manzanilo LNG Terminal Project, represented POSCO in LNG Tank Storage Service Project and represented STX Energy in Renaissance Project in Alabama, USA.

He ever worked as a foreign associate at Richard Butler, London Office (2001) and at Richard Butler, H.K. Office (2002) to enhance his specialty in maritime area as well as to establish a good network with shipping-related firms in UK. He also took a secondment at Beaumont & Son to advance his competitiveness in aviation area. He was a lecturer in maritime law at the Judicial Research and Training Institute in 2008.