Born in Safed, Israel, Ohayon started his career in Hapoel Galil Elyon, with whom he won the Israeli youth league championship. In the 2006–07 season, he led Hapoel Galil Elyon to the Israeli final four, with the team ultimately finishing in third place. In the 2007–08 season, Ohayon was the Ligat Winner's steals leader, with 2 steals per game.
In the summer of 2012, Ohayon went to Russia for a medical test, before signing a contract with Lokomotiv Kuban, without informing Maccabi, with whom he still had a contract. Ohayon was not allowed to sign for any other team, before buying out his contract for around $200,000 USD.[2] However, on September 19, 2012, FIBA ruled in favor of Maccabi Tel Aviv, after the team sued Ohayon through FIBA. If Ohayon wanted to leave Maccabi Tel Aviv, Lokomotiv Kuban would have to have reached an agreement on a buyout with his former club.[3] Ohayon signed a new a deal with Maccabi instead, and agreed with them on a new three-year contract.[4]