Dorrington was born in 1940 and was baptized and confirmed in the Anglican Church of Canada, where he served as a choirboy, studying voice at the Toronto Conservatory of Music.
[2] In 1996, the General Council of the Reformed Episcopal Church voted to invite the Reformed Episcopal Church of Canada back into its diocesan structure, creating the Diocese of Western Canada and Alaska to serve Alaska, Alberta, British Columbia, Saskatchewan, and the Yukon.
[2] Upon his consecration, he succeeded Ted Follows as bishop ordinary of western Canada and Follows focused on his service as rector of Church of Our Lord.
Oversight of churches in Cuba fell to Dorrington's Diocese of Western Canada and Alaska due to the lack of direct U.S.-Cuba relations and limitations on trade and travel.
[4] In 2014, Dorrington consecrated Willians Mendez Suarez—who had become pastor of the first REC Cuban church in 2009—as suffragan bishop of the missionary district.
[7] Dorrington's wife, Claudia, is active in the Inner Healing Ministry in Victoria, as a prayer counselor with Victoria Prayer Counselling and as a board member of the Cridge Centre for the Family, British Columbia's oldest continuously operating nonprofit social services organization.