As a clinical psychologist she worked with adults and families on topics covering antenatal care, genetic counselling and occupational stress. Her later career interests have been in designing and evaluating methods of behavioural change, especially in relation to wellbeing and health improvement. In 1993, Michie moved to the Psychology and Genetics Research Group,
King's College London where she conducted research into the process and outcome of genetic counselling, public and professional attitudes towards genetic testing, informed choice and decision making about prenatal screening and genetic testing, and the psychological impact of predictive genetic testing. She continued her clinical work, consultancy and research at the Royal Free Hospital’s Occupational Health and Safety Unit part-time. In 2002, Michie joined the Psychology Department of
University College London (UCL), where she is Professor of Health Psychology. She is director of UCL’s Centre for Behaviour Change and of its Health Psychology Research Group. Michie has served as president of the European Health Psychology Society and chair of the British Psychological Society’s Division of Health Psychology. She will advise the WHO on how to increase adherence to vaccination campaigns and other initiatives that influence national health policy. Some social media users expressed concern over her hiring due to Michie's stances during the COVID epidemic.
Recognition Michie was elected a Fellow of the British Psychological Society in 2001, the European Health Psychology Society, and the US Society of Behavioral Medicine and Academy of Behavioral Medicine Research. In 2020, she became a participant in the
COVID-19 SAGE's Scientific Pandemic Insights group on Behaviour (SPI-B). She also sits on the
Independent SAGE committee, chaired by
Sir David King. Michie frequently contributes to national news media during the COVID-19 pandemic as an expert in behaviour change, notably in May 2020 when
a government advisor left the city and thus broke the government's COVID-19 rules. ==Personal life==