At club level, Doonan has played for and captained both Kinawley and Queen's University.
On 9 March 2018, she helped Queen's University win the O'Connor Shield final, scoring a goal and being named Player of the Match.
[6][7] In November 2019, she was named to the Gaelic Life Ulster Club All-Stars Ladies Team of the Year.
Doonan has played for Fermanagh in two All-Ireland Junior Ladies' Football Championship finals.
In 2017, she scored the winning goal as Fermanagh claimed the All-Ireland Junior title by beating Derry GAA after a replay.