He also played for Kello Rovers, Auchinleck Talbot, Clyde, Ayr United, Greenock Morton and Arbroath.

Doolan joined Partick Thistle in 2009 after an impressive start to his career in the Scottish junior leagues with Kello Rovers and Auchinleck Talbot.

Born in Irvine,[1] he began his career by playing in the Junior leagues, first with a two-year stint at Kello Rovers, before moving on to Auchinleck Talbot.

He had a successful time at Beechwood Park, and eventually went on trial for Scottish First Division club Partick Thistle.

Following a successful trial which began in October 2008, despite interest from Scottish Premier League sides Kilmarnock and Motherwell Doolan was signed by Partick manager Ian McCall on an 18-month deal from Auchinleck on 9 January 2009.

However, he subsequently scored a spectacular 92nd-minute goal on the final day of the 2009–10 season against Queen of the South to give The Jags a 1–0 victory.

[11] On 7 April 2013, he scored in the last seconds of extra-time against Queen of the South in the 2013 Scottish Challenge Cup Final to make it 1–1 and take the match to penalties.

Following a poor run of results for Thistle, striker Lyle Taylor was brought in on loan from Sheffield United in the January transfer window.

Goals from Doolan and Taylor eventually helped Thistle secure their place in the Scottish Premiership for the 2014–15 season.

[17] He scored his first league goal of the season in a 2–0 away win against Dundee at Dens Park making it 2–0 with a second half strike.

[citation needed] He played in both legs of the Premiership play-offs against Livingston, scoring his club's only goal in the tie as they were defeated 3–1 on aggregate and relegated to the Championship.

[20] On 1 September 2018, in a league match at Firhill against Greenock Morton, Doolan scored a legitimate goal which was not awarded: the ball struck the underside of the crossbar from his shot, bounced on the solid tube holding the net to the ground, came back out of the goal area and was kicked into touch by a frustrated defender.

[21] Thistle still won 1–0 despite the error and Doolan was awarded a goal bonus which he donated to charity, with the amount matched by the club.

[22] A similar incident had occurred at the same end of the same stadium in 1993 when a shot by Dundee United's Paddy Connolly entered the goal and rebounded off the supporting stanchion, but was not awarded even though a defender then caught the ball and handed it to the goalkeeper.

On 24 June 2019, Doolan signed a one-year deal with Ayr United and once again linked up with then former Thistle manager, Ian McCall.

[32] Doolan's form at Auchinleck Talbot was recognised by the Scottish Junior Football Association (SJFA) with his selection for the Umbro Quadrangular Tournament in 2008.