Murray said: “After speaking with the manager there was only one destination for me. I see myself as a leader and I am excited to meet all the boys and get started.”
Boss Paul Hartley added: “He’s got real leadership qualities. He’s been a part of a title winning team and he is hungry for more success. We’re excited to work with him over this busy period.”
The defender has previously played for Arbroath, Clyde, Stenhousemuir, Raith Rovers, Dunfermline Athletic and Kilmarnock.
The defender joins subject to international clearance.