Joon is an expert in criminal law, traffic law, tax prosecution and getting clients discharged without conviction. He works in all courts across New Zealand.

Joon has over ten years of criminal law experience. Joon has previously worked as a senior prosecutor for the New Zealand Police, prosecutor for the Inland Revenue and as a lawyer at the Public Defence Service. Joon has also worked for Parliamentary Services working with Members of Parliament and has run several businesses and charities. Joon also works as a Tenancy Adjudicator for the Tenancy Tribunal.

Joon prides himself in providing clients with the best results possible – whether it be through a jury trial, judge-alone trial, discharges without a conviction or negotiating the charges down. Joon also regularly appears for appeals at the High Court and also at the Court of Appeal.

Joon is multi-cultural. He was born in Seoul, grew up on the North Shore and has lived in the CBD, Māngere and west Auckland. Joon has a Bachelor of Laws degree from the University of Auckland and a Bachelor of Science degree with specialisation in computer science. Joon has also spent time studying at the Seoul National University. Joon was also a prize-winner for Te Reo Māori for three consecutive years during his time at Rangitoto College.