Angus Macmillan Douglas was employed for 20 years by British Petroleum plc in roles including Chief Executive of BP East Africa, Commercial Manager for BP Gas in Europe and as Director of External Affairs for BP Group. On retirement from BP, he took up post as Director of the Scottish Blood Transfusion Service and held associated roles as Chairman of the UK Co-ordinating Group of Blood Services, Director of the European Association of Blood Services and Director of the Common Services Agency of NHS Scotland.

After retiring from the NHS, Angus Macmillan Douglas took on the role of a small farmer, is Chairman of Leah Healthcare and Chairman of Angus Conservative Association and co-manages a European Commission Public Health Project. Angus Macmillan Douglas is married with two children and lives near Forfar.