Taeseob “Jacob” Um


TEL. 02-538-5886

FAX. 02-538-5887

E-mail. tsum@ohkimslaw.com

Jacob manages civil and criminal litigation cases for corporate, financing, and intellectual property cases. He has represented biomedical, pharmaceutical and health services clients for lawsuits relating to IP licensing and shareholder derivative actions. Jacob was lead defense counsel for several pharmaceutical companies in criminal cases pertaining to rebate programs. Jacob is one of the few attorneys in Korea who practices class action litigation. As such, he is well-positioned to advise a client on defending from a class action suit.

Jacob has extensive experience in advising clients on regulatory affairs and policy consulting, particularly on health care policy and regulation. Having worked as an advisor for various standing committees in the National Assembly, he has expertise in the government’s legislative and regulatory processes. Jacob advises numerous clients on new or revised government regulations in the healthcare, medical, and defense sectors.


2019   OhKims Law & Company

2016   Policy Advisor, National Assembly

2015   Dong-A ST Corporation (Compliance Officer)

2014   Dong-A Socio Holdings Co. (Corporate Counsel)


2013   Jeonbuk National University School of Law (J.D.)

2008  National Institute for Lifelong Learning (B.A. in Business Administration)

2003  Korea Military Academy (Class of 61st)



  • Numerous cases of insurance fraud and improper payments against hospitals
  • Represented victims in claims against Optimus Fund.
  • Represented small business owner in contract dispute with Coupang.
  • Represented shareholders suing pharmaceutical company over false disclosures.
  • Represented plaintiffs in litigation for damages from North Korean prisoners of war
  • Advisory attorney to the President of the Korean Dental Association


  • Part of joint response to victims of SkyEdu Freepass lecture fee refund.
  • Represented plaintiff for damages arising from defective breast implant against Allergen.
  • Fraud claim related to Ronaldo’s “no show.”
  • Represented shareholders against KOLON Life Sciences and KOLON TissueGene for false disclosures
  • Represented plaintiffs in class action lawsuit against Invossa of KOLON
  • Petitioned Constitutional Court for trial regarding the non-counting of public health doctor’s four-week training service period.
  • Part of joint response to small business owners who suffered due to internet outage at KT
  • Achieved the cancellation of expired compensation claims
  • Advisory Attorney for Seoul Mayor’s campaign team


  • Member of the Mediation Committee


2013   Korean Bar Admission (2nd Korean Attorney Examination)


Korean (Native), English (Fluent)

OhKims Law & Company 
CEO: Sungheon Oh, Yongbeom Kim, Changho Choi       

Business Licence: 349-81-01238

Seoul Office: 6,11th floor, Seongdo Building, Dosan-daero 207, Gangnam-gu, Seoul

Contact: 02-538-5886

Personal Information Manager: Inheok Song

Copyright ⓒ 2021 ohkimslaw.com. All Rights Reserved.

OhKims Law & CompanyCEO: Sungheon Oh, Yongbeom Kim, Changho Choi    Business Licence: 349-81-01238

Seoul Office: 6,11th floor, Seongdo Building, Dosan-daero 207, Gangnam-gu, Seoul  

Contact: 02-538-5886

Personal Information Manager: Inhyeok Song

Copyright ⓒ 2021 ohkimslaw.com. All Rights Reserved.