He currently plays for Montrose, wearing the number 20 shirt. He plays primarily as a Midfield. His preferred foot is Left.

His most recent move was a from Dundee United FC U18 to Montrose on 2024-08-20.

Across 25 appearances in the Scottish League One 2025-2026, Keir Bertie registered 0 goals and 2 assists, while completing 0 key passes out of 0 total passes with a passing accuracy of -.