Nakimwero is a former forestry officer in the Kiboga District. Nakimwero was a coordinator for the Parliamentary Forum on Climate Change -Uganda (PFCC-U). She was the chairperson for the 20 Ugandan parliamentary Fora. Nakimwero is a member of the Green Climate Fund Designated Authority Committee. She is the director of the African Coalition on Green Growth. Nakimwero is a member of the Uganda Climate Change Thematic negotiation group under the United Nations Framework Convention on Climate Change arrangement. Nakimwero is a member of the National Association of Professional Environmentalists. She also sits on the Parliamentary Committee on Environment and Natural Resources
