He previously played for Celtic, Falkirk, Motherwell, Inverness Caledonian Thistle, Ross County and Ayr United.
Raised in Cambuslang[9][10] and a pupil at Trinity High School, Rutherglen,[11] Chalmers joined Celtic at the age of 10 and went on to progress through the youth ranks at the club's academy.
[13] A member of the club's under-20 side,[14] on 25 August 2012, he made his senior debut for Celtic, coming on as a 76th-minute substitute in a Scottish Premier League match against Inverness Caledonian Thistle, replacing Emilio Izaguirre.
He was injured for the Bairns' Scottish Premiership play-off campaign, meaning his last appearance came in a 3–1 home win against Alloa on 3 May 2014.
[25][10] He scored his first career goal versus Queen of the South in a 3–1 win, in which the ball rolled over the line after being deflected around the box by the defenders.