Lee Young-kyung graduated from Yonsei University Law School and completed the 45th Judicial Research and Training Institute.

After that, she worked as a public interest lawyer at the Korea Legal Aid Corporation, handling numerous civil lawsuits, including wage and severance pay cases, and performing preservation and execution procedures. She also served as a public interest lawyer at the Supreme Prosecutors' Office, reviewing national litigation and administrative litigation cases over 500 million won according to the National Litigation Act, as well as participating in the preparation process for the Supreme Court's public hearing (regarding double sale of real estate and conscientious objection) that garnered media attention.

Subsequently, she accumulated expertise in the field of corporate legal affairs through various tasks at the law firm (limited liability) Sejong, including advisory and litigation related to fair trade (Fair Trade Act, Subcontracting Act, Agency Act, Standard Terms Act, Franchise Business Act, etc.), governmental affairs involving regulatory agencies like the Fair Trade Commission, and responses related to sanctions against unscrupulous businesses in public institutions.

Currently, as a member of the law firm Cheongchul, she provides high-quality legal services in areas such as corporate law, fair trade, administration, and general civil and criminal cases.