Donald received a Bachelor of Science of Forestry from the University of Toronto in 1971. He spent the next 37 years planting trees, managing deciduous forests and plantations among other tasks at the ST Clair Region Conservation Authority. Since retirement from the Conservation Authority he operates a forestry consulting business. He has spent several years trying to identify populations of rare tree species in the region and protect them. In 2013 he received a Lifetime Achievement Award from Carolinian Canada Coalition. He is a member of the Ontario Woodlot Association, the South West Woodlot Association, the Ontario Forestry Association and the Ontario Professional Foresters Association. He currently volunteers with the Thames Talbot Land Trust to try to protect, enlarge and improve forest habitats in the region.