Donnelly Barrister and Solicitor was founded in 2008 to service Canada's leading non-profit and charitable organizations, primarily Environmental Defence and its clients such as the Ontario Greenbelt Alliance, Green Gravel Coalition, Huron-Wendat Nation and Founding First Nations Circle, Campaign Lake Simcoe and others.

Donnelly Barrister and Solicitor also maintains a small list of progressive developers and corporations seeking to "green" their businesses and projects. The firm offers services in the following practice areas: