She is the immediate past deputy executive director of the Kampala Capital City Authority (KCCA).
Tukahirwa attended the Shimoni Primary School in the city centre at that time and Trinity College Nabbingo for her O-Level and A-Level studies.
Her doctorate in urban sanitation and solid waste management was obtained from Wageningen University in the Netherlands.
The subject of her doctoral thesis was about the role of civil society organizations in urban sanitation and solid waste management in cities within East Africa.
Following her doctoral studies, she worked as a researcher on the Lake Victoria Environment Project in the Uganda Ministry of Lands and Urban Development, sponsored by the World Bank.