Born in Glasgow, Michael Tidser began his career with Celtic and was captain of the Under 19' side before being released. Subsequently signed a short-term contract with Swedish side Östersunds FK. After his contract expired with Östersunds, he went on and signed an 18-month deal with Greenock Morton.
Tidser would make an impressive start for the club, which resulted in winning Young Player of the Month for March 2010, while at the same time had also been watched by Rangers.
In 2010/11 season, Tidser scored his first goal for the Cappielow club, in a 2–0 win over Partick Thistle. His impressive performances continued with Scottish Premier League's Kilmarnock and League One side Huddersfield Town running the rule over the player.. Then, on 12 February 2011,Tidser signed a new three-year deal to stay with Morton.
The following season, Tidser began the season, scoring his first goal of the season in a 2–1 win over Livingston on 13 August 2011. A week later, on 23 August 2011, he scored again in the second round of the Scottish League Cup, in a 4–3 loss against St. Mirren.
However, his early season form was overshadowed with knee problem injury. Following an operation, it was announced that he would be out for two-months. In January 2012, Tidser was made Morton's team captain just after his 22nd birthday. On 20 March 2012, he scored his second goal of the season, in a 2–0 win over Falkirk.
In 2012–13 season, Tidser made an excellent start to the season with the club, having made a good display to compete with Partick Thistle to get promoted to Scottish Premier League, which Morton finished second. On 6 October 2012, Tidsar was a pivotal player, in a 3–1 win over Partick. It wasn't until 29 December 2012 when Tidser scored twice, in a 4–2 win over Dunfermline Athletic.
That was followed up on 26 January 2013 when he scored in a 1–0 win over Raith Rovers. His next goal came on 23 February 2013 when he, again, scored against Dunfermline Athletic, with the same result on 29 December 2012. On 16 March 2013, Tidsar scored his final goal of the season, in a 3–0 win over Dumbarton.
During the season, he also scored five times in the Scottish Cup, including two doubles against Albion Rovers and Turriff United, which was scored in the Scottish Cup replay. However, Tidser suffered an groin injury, that ruled him out for the rest of the season.
After a great season, Tidser was nominated for the 2012–13 First Division Player of the Year. It went better for Tidser when he won the supporters' club awards. In June 2013, Tidser was the subject of a £50k bid from Rotherham United, which was rejected initially by Morton. Soon afterwards, the bid was made again, but this time, it was accepted.
Tidser officially signed for Rotherham United on 3 July 2013. A week later, on 9 July 2013, Tidser played against his former club, Morton and when he was substituted, Tidser was given a standing ovation from Morton's fans.
Tidsar finally made his debut after coming on as a late substitute, in a 2-1 win over Crawley Town. Subsequently joined Scottish Premiership side Ross County on loan, on 3 January 2014, making his debut as a second half substitute versus St Johnstone, in a 1-0 victory for the home side on 4 January 2014, at the Global Energy Stadium.
On 1 September 2014, in the last hour of Deadline Day, Tidser signed for Oldham Athletic on loan until January 2015
Tidser made three appearances for both the Scotland under-18 and under-19 sides, scoring once for the under-18's against Turkey.