- Principal Scientist Bacterial Transmission
- at The Wellcome Trust Sanger Institute
- Head of Pathogen Research at The Wellcome Trust Sanger Institution
- Professor of Parasitology
- Marks and Spencer Professor of Farm Animal Health, Food Science and Food Safety
- Professor of Medicine
- Principal of Makerere University College of Health Sciences
- Director of the WHO Collaborating Centre
- Head of the Centre for Pathogen Evolution
- Professor of Medicine
- Head of Department
- Senior Lecturer in Epidemiology
- Honorary Epidemiologist at Public Health England (Immunisation)
- University Lecturer
- Alborada Professor of Equine and Farm Animal Science
- Head of Department of Veterinary Medicine