He now has over 40 years experience in vector-borne disease transmission and control research on protozoa, helminths, viruses and bacteria transmitted by mosquitos and ticks. He has extensive scientific international field experience with short and long term projects in countries in Asia, Africa and the South Pacific (e.g. Indonesia, Papua New Guinea, Solomon Islands, Vanuatu, Angola, and Ethiopia). He has also developed and delivered courses and training materials at the professional and technical levels for vector borne disease specialists.