Stewart Nimmo joined the City of Brockville Pipe Band in 1996 after taking piping lessons with the Band. While playing with the Brockville Band, he has also played with the Spencerville Legion Pipe Band and on occasion with the Ontario Massed Legion Pipes & Drums and the 33rd Halifax P&D. Stewart has played for royalty with bands in both Scotland and the Netherlands.

Stewart became Pipe Major of the Brockville Pipes & Drums in April 2009.