Gu Wan Sun graduated from Sung Kyun Kwan University majoring in law and completed Judicial Research and Training Institute (31st Class). Upon completion of his training at Judicial Research Institute, he worked as public service advocate at Korea Legal Aid Corporation, Litigation Part. In April of 2005, he joined Lim, Chung & Suh and his practice focuses in the areas of real property development and construction, including city management business, project financing, etc.), contractor disputes, construction defect disputes, payment recovery claims, construction and plan disputes.