Lee Jong Hyun has worked as a music critic and music broadcaster since 1993, and is the founder of MPMG(as known as MASTER PLAN), which is a famous music company for labels and festivals(Grand Mint Festival, Beatiful Mint Life, and many others). Recently, as the first president of MCIAK(Music Concert Industry Association of Korea) established in 2021, his efforts have been made to develop the music concert & festival industry in Korea.