Dr Lawson did his dental training at Dundee University, graduating with honours in 1990. He undertook his orthodontic specialty program at the University of Wales, graduating with distinction in 1996.
He gained his Membership in Orthodontics from the Royal College of Surgeons of Edinburgh, winning the William Houston gold medal. Since 1996, he has been is specialist practice in Edinburgh, where he is a partner in Edinburgh Orthodontics, treating a mix of NHS, private, teenage and adult cases.
He is co- chairman of the Scottish Orthodontic Specialists Group, and is an examiner at the Royal College of Surgeons of Edinburgh.