He went on to lead the epidemiology and socioeconomics research programmes at the International Laboratory for Research on Livestock Diseases (ILRAD) and the International Livestock Research Institute (ILRI) for 20 years, where he specialised in the integration of veterinary epidemiology and agricultural economics to assess the impacts of livestock diseases and their control in low and middle income country settings,.[9][10][11][12] Since leaving ILRI in 2007 he has made several analytical contributions on the role of livestock and disease control in pro-poor growth.[13][14] He recently reviewed the current demands on global livestock research, and the performance of the Consultative Group for International Agricultural Research (CGIAR) in a White Paper.[15] He has led many independent evaluations of public funding investments in agricultural development and health in different countries and regions of the world, including the Real Time Evaluation of the global programme against highly pathogenic avian influenza, run by the Food and Agriculture Organisation of the United Nations (FAO).[16]