[1] Leeman joined fellow Belfast side Crusaders in June 2011, linking up with former Glens team-mate Michael Halliday.
[5] He scored his first Crusaders goal in a 5-1 league victory over Carrick Rangers on 29 October 2011.
[6] Leeman returned to Glentoran as a coach on 24 May 2018 alongside former team-mate Gary Smyth.
Following the sale of Glentoran, Leeman left the team in controversial circumstances on 23 May 2019, two days after Smyth.
[3][7] He returned to Crusaders in July 2019, filling the post of first team coach vacated by the long-serving Charlie Murphy.