McLaren was educated at Rawyards Public School, Airdrie and Gartsherrie Science and Art School, Coatbridge. He was mining lecturer, colliery manager, and inspector of mines in Scotland. He was a president of the Mining Institute of Scotland and a vice-president of the Federated Institute of Mining Engineers.
He was a member of the Lanarkshire Education Authority from 1924 until 1928.
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