Before moving to Canada, Ohin played football in Ghana from 2008 to 2010 before being recruited by a club in Switzerland, where he played from 2010 to 2011. He later played in Germany, Thailand and Sweden. In 2016, Ohin began playing with USL Premier Development League side WSA Winnipeg and made nine appearances that season, scoring one goal. In 2017 he made eight appearances and added four goals, and made another eight appearances in 2018. On 10 January 2019, Ohin signed with Canadian Premier League side Valour FC. As of 2025, Ohin is the captain of Valour FC and has appeared in 108 total matches for the club, making him the all-time leader.