OTTAWA – Longtime civil servant and former CBC president Al Johnson died Tuesday in Ottawa. He was 87.A native of Saskatchewan, Johnson occupied a number of senior management positions within the provincial and federal public service before serving as president of the CBC from 1975 to 1982.Johnson, who was also a teacher, researcher, political consultant, and professor at Queen's University, received a number of awards and honours, including the Vanier Medal for his leadership in public administration, and a Companion of the Order of Canada.He is survived by his wife, Ruth, four children and one granddaughter.