In 1992 Corbett completed her membership of the Royal College of Physicians (MRCP) before earning a Diploma of Tropical Medicine and Hygiene in 1996.
[3] Her doctoral research investigated tuberculosis in relation to HIV in South African gold mining communities.
At the time she completed her training, medical services in developing countries were overwhelmed with deaths from HIV and tuberculosis.
[4] Corbett joined the faculty at the London School of Hygiene & Tropical Medicine in 2000 and moved to Harare, Zimbabwe in 2001.
[4] Since 2009 Corbett has worked as an Epidemiologist at the London School of Hygiene & Tropical Medicine and part of the Malawi Liverpool Wellcome Trust program based in Blantyre.
[4] She has since lobbied Unitaid and Population Services International to provide self-testing in six African countries, raising over $72 million to support research and community-level implementation.