Kerrie's research explores the impact of conflict and migration on maternal and child health, having been influenced by her experiences of conflict whilst growing up in Northern Ireland. In November 2022 she began a PhD exploring maternity care for underserved migrant women in the UK, and will use the newly created Million Migrant Cohort Study to explore perinatal outcomes amongst low-income migrants to the UK, as well as the UK and Ireland Confidential Enquiry in Maternal Deaths (MBRRACE-UK) database to explore factors associated with maternal death amongst migrant women in the UK. She is collaborating with a range of stakeholders in this work including NHS England, the Department for Health and Social Care, the Royal College of Obstetricians and Gynaecologists, the Royal College of Midwives, Maternity Action, and Doctors of the World UK.

Kerrie has worked with a number of NGOs (Doctors of the World, Médecins Sans Frontières, Save the Children) and local Ministries of Health, and has worked in the Middle East (Lebanon, Jordan, Yemen) and in Europe (Greece, UK). She is passionate about improving access to healthcare for migrants and is the Migrant Health Advocacy Lead at the Faculty of Public Health, and is a member of the Lancet Migration Global Collaboration on Migration Health. She currently sits on the NHS Maternity Service Users' Equality Steering Group, the National Migrant Health Coalition, and jointly leads the UK City of Sanctuary Maternity Research Network. In 2021 she was awarded the UK Faculty of Public Health President Medal for outstanding service to Public Health.