 On July 1, 2011, Mun became CEO (with Lee Min-woo as co-CEO) of Shinhwa Company, a joint venture agency for members Shinhwa to perform as a group.The Company manages the group as a whole, whilst members' individual activities are managed by their respective agencies.As part of Top Class Entertainment he produced girl group Stellar, who debuted in August 2011 with the song "Rocket Girl".