A junior for the Canterbury-Bankstown Bulldogs, Weisner played in their 2000 Jersey Flegg Cup team alongside Braith Anasta and Roy Asotasi.
In England, Weisner played for the Leigh Centurions, Halifax, Harlequins RL, Barrow Raiders and Hull Kingston Rovers.
[3] In 2015 Weisner was appointed as the Blacktown Workers's football director and co-coach of the Ron Massey Cup side.
[4] The club entered a team into the 2017 Intrust Super Premiership NSW in partnership with the Manly-Warringah Sea Eagles, and Weisner was appointed as coach.
In 2021 he was appointed assistant coach and head of recruitment at the North Sydney Bears NSW Cup team.