 In 1987, she obtained a Certificate in Law Reporting, from the Commonwealth Youth Centre, in Lusaka, Zambia.Later, in 2016, she was awarded a Master of Laws (LLM) degree, by the University of London, specializing in Public International Law.Bossa has been a human rights activist since 1980 and founded non-profit organisation including the East African Centre for Constitutional Development, the Uganda Network on HIV, AIDS, Ethics and the Law and the Uganda Law Society.