Career
Do signed a three-year deal with Australian A-League club Brisbane Roar on 17 July 2012, making him the youngest player to occupy a Visa spot in the A-League. On 17 July 2013, Dong-Hyun signed for J. League Division 2 team Football Club Gifu, where he made 5 appearances for the team Dong-Hyun was drafted by NorthEast United in the Inaugural Indian Super League draft on 21 August 2014.
He joined East Bengal in 2015 for the 2015-2016 I-League.