2005- present. Professor of Molecular Virology, Department of Medical Microbiology, School of Medicine, Cardiff University
2000-2005. Reader. University of Wales College of Medicine.
1995-2000. Senior Lecturer, UWCM
1992-1995. Lecturer. UWCM.
1979- 1992. MLSO - Principal Grade Scientist, PHLS Centre for Applied Microbiology and Research. Porton Down, Salisbury
1987-1988. Postdoctoral Research Scientist, Stanford University School of Medicine, California
Pwyllgorau ac adolygu
Member of MRC Infection and Immunity Board
Member of Scientific Advisory Board for Regional Centre for Applied Molecular Oncology (RECAMO) located in Masaryk Memorial Cancer Institute, Brno, Czech Republic.
External member of the Registry of the Institution: University of Crete.
External Examiner Imperial College London, MSc on the Molecular Biology and Pathology of Viruses. 2013-present.
External Examiner, Liverpool University MRes in Clinical Sciences, 2013-present.