 Following the exit of the LionsXII from the Malaysia Super League, Khairulhin signed for Hougang United for the 2016 S.League season following the advice of former head coach and Singapore legend Fandi Ahmad.He started the season as the first choice goalkeeper for the Cheetahs, keeping 2 clean sheets in his first 3 games.After 12 games, Khairulhin had kept 4 clean sheets, more than any other local custodians in the league.