Aug 2006 to date: Head of Research Methods Group (RMG), International Livestock Research Institute (ILRI), Nairobi, Kenya. (Assistant Head 2006 - 2008, Acting Head 2009) July 2003 – July 2006: Statistician, Forest Research, an agency of the Forestry Commission, Surrey, UK Nov 2001 – June 2003: Biometrician & Projects Co-ordinator, CAB International – Africa Regional Centre, Nairobi, Kenya 2001: Consultant Biometrician: CAB International – Africa Regional Centre, Nairobi, Natural Resources Institute (NRI), U.K., World Agroforestry Centre (ICRAF), Nairobi 1997 – 2000: Associate Scientist (Biometrician), World Agroforestry Centre (ICRAF), Nairobi, Kenya