[2] Previously, between November 2016 and August 2019, she was the chief operating officer (Upstream) of the Uganda National Oil Company.
[3] Prior to that, she was a Senior Geologist at the Petroleum Exploration and Production Department (PEPD), in the Uganda Ministry of Energy and Mineral Development, the first woman to hold that position.
The data that the team collects is used to estimate how much oil and gas lies beneath the ground in the country.
[4][5] For a period of nineteen months, from April 2015 until October 2016, Nabbanja was Acting Principal Geologist at PEPD, the position she left to join UNOC.
[4] Proscovia Nabanjja was appointed by Minister of Health in 2020 as member of board of directors of Malaria Free Uganda, a private public initiative by Government of Uganda under Ministry of Health charged with helping National Malaria Control Division (NMCD) in removing barriers towards implementation of National strategic plan through Advocacy, resource mobilization and accountability to all stakeholders.