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She retained her seat in the 1988 federal election for the redistributed riding of Capilano—Howe Sound. She was appointed to the Cabinet of Prime Minister Brian Mulroney as Associate Minister of National Defence from 1989 to 1993. She also served as Minister responsible for the Status of Women from 1990 to 1993.
In January 1993, she became Minister of Western Economic Diversification and Minister of State for the environment as well as Status of Women
Her career ended that fall with the defeat of the Campbell government in the 1993 federal election, a contest at which she was pushed into third place in her own riding behind Reform's Herb Grubel and the Liberal candidate.
After leaving politics, Collins was President of the BC Health Association. She served as an honorary co-chair of the women's campaign school of the Canadian Women Voters Congress, and as a consultant in promoting women's political development in Vietnam and Ukraine. She then spent five years in Russia (2002-2007) working on a health reform project in Chuvashia and for the World Health Organization in Moscow. As of March 2008, she became the Executive Director of the BC Alliance for Healthy Living until her retirement in March 2018. She currently lives in Victoria BC where she serves as a member of the Saanich Police Board and is the President of the BC Association of Police Boards. She is also a member of the Pacific Opera Victoria Board and the Boards of the Canadian International Council Victoria Chapter as well as the Canadian Association of Former Parliamentarians. She holds honorary doctorate degrees from Royal Roads University and Royal Roads Military College and is a recipient of the Distinguished Alumni Award from Queen's University and was the inaugural recipient of the Kathleen Beaumont Hill award given by the Vancouver Queen's University Alumni. She also has received the Queen's Jubilee Award.