Joomin is an expert in policing and criminal investigation, having served for approximately 34 years at the Korean National Police Agency across key positions in investigation, intelligence, and international affairs.

He held major posts including Commissioner of the Seoul, Incheon, and Ulsan Metropolitan Police Agencies, Director General of the Foreign Affairs Bureau, and Chief Intelligence Review Officer at the National Police Agency, where he oversaw major criminal investigations, intelligence operations, and the establishment of international cooperative investigation systems.

Joomin also served as Police Attaché (Consul) at the Consulate General of the Republic of Korea in New York, contributing to the protection of Korean nationals overseas and building a foundation for international public-safety cooperation.

In addition, as the President of the Korea Road Traffic Authority, Joomin oversaw transportation and safety policy development, organizational management, and the improvement of public-safety infrastructure, gaining extensive experience across national safety and risk-management fields.

Based on this background, Joomin currently supports SEUM Law in matters including strategic advice during investigation and inquiry stages, response to major accidents and safety risks, and government-relations advisory services related to public institutions and licensing.