Dugald trained at St Martins School of Art concentrating on graphic design and illustration. He has spent a number of working years in business in the city. During that time he continued to have Exhibitions of Botanical work.

He has exhibited at the following galleries:
Moreland Gallery, Cork Street, London
Fortescue Swann Gallery, London
Malcolm Innes, Bury Street, London

He has also exhibited in general exhibitions at:
The Royal Watercolour Society
The Royal Institute of Painters in Watercolours
The Royal Society of Portrait Painters
The Society of Botanical Painters

He held further exhibitions at The Ebury Galleries, Chelsea, and Glebe Place. These exhibitions were of botanical, architectural and landscape paintings. Dugald was appointed in 2013 chairman of the Chelsea Physic Garden Florilegium Society.

Most of his time is currently spent working on commissions mostly of both botanical and of architectural subjects.