I find the best list of major Korean law firms/attorneys can be found at HG. Not all law firms on the list are advised to be utilized, additionally, I suggest, always, hiring an experienced foreign lawyer to work alongside your Korean lawyer. The best foreign lawyers are, typically, those with significant experience working alongside Korean judges and prosecutors.
Few foreigner lawyers have experience with litigation, thus, if you are involved in litigation, please consult with one of the handful of international attorneys in Korea that have experience with the Korean court system and have a substantial experience working in an equal capacity with Korean lawyers.
Sean Hayes may be contacted at: SeanHayes@ipglegal.com.
Sean Hayes is co-chair of the Korea Practice Team for an international law firm. He is the only non-Korean to have worked as an attorney for the Korean court system (Constitutional Court of Korea) and one of the first non-Koreans to be a regular member of a Korean law faculty.