Calum was educated at Paisley University where he gained a BA Honours degree in Health Studies and at Glasgow Caledonia University where he received an MBA. He started working with the NHS in Scotland in 1984, initially as a nurse, and then Health Visitor before moving into general management.

Calum’s previous post was Acting Chief Executive at ABM University NHS Trust. Prior to this he held the positions of Acting Chief Executive with Swansea NHS Trust, and Assistant Chief Executive at ABM.