[1] He attended Garak High School [ko] and obtained a bachelor's degree in law at Seoul National University.

[1][2][3] He was firstly appointed a judge at Suwon District Court [ko] in 2008 and worked for 2 years.

[2] He was briefly a barrister at the Korean Public Interest Lawyers Group from 2019[2] to 2020, till he joined the politics.

[1][3] Shortly after this, he had found out some documents, such as the Judiciary Blacklist and the Dissolution Plan of the Institute of International Human Rights Law; both are related to the former Chief Justice of the Supreme Court Yang Sung-tae.

[4] In the election on 15 April, he received 53.46% and defeated the United Future candidate Kim Bum-soo.