• 2005 – present Senior Scientific Officer. NERC Centre for Ecology & Hydrology, UK
• 2009 – 2014 Senior Research Associate University of Oxford, Department of Zoology, UK
• 2008 – present U.K. Scientific Pandemic Influenza Advisory Committee
• 2008 – 2010 M.Sc. in Biology, Lecturer & Organising Committee, University of Oxford, Department of Zoology, UK
• 2005 – 2007 Honorary Lecturer. School of Geography, Earth & Environmental Science, University of Birmingham
• 2004 Visiting Lecturer. Bioremediation. M.Sc. in School of Biological and Molecular Sciences, Oxford Brookes University, UK.
• 2001 – 2005 Higher Scientific Officer. NEC Centre for Ecology & Hydrology—Oxford, United Kingdom
• 2000 – 2001 Lecturer. Department of Environmental Sciences, University of California, Riverside, California.
• 2000 Postdoctoral Researcher. Department of Environmental Sciences, University of California, Riverside, California.
• 1998 – 2000 Graduate Teaching Assistant & Lecturer. Environmental Sciences, University of California, Riverside.
• 1996 – 2000 Graduate Student. Department of Environmental Sciences, University of California, Riverside, California. PI: D.E. Crowley