His early postdoctoral research was diverse, including the analysis of ground and satellite data on VLF emissions, mechanisms of insect olfaction and vision, and biological catalysts.
From 1975 to 1985 he worked in the CSIRO Division of Mathematics & Statistics, the Australian national research organisation, on topics such as the integration of wind power into electricity grids.
[3] Based on his belief that science, technology and economics should serve the community at large, Dr Diesendorf has been at various times the Secretary of the Society for Social Responsibility in Science (Australian Capital Territory), President of the Australia New Zealand Society for Ecological Economics, co-founder and Vice-President of the Sustainable Energy Industries Council of Australia, and co-founder and President of the original Australasian Wind Energy Association.
Previously Dr Diesendorf was one of the leading proponents calling for the ethical, scientific debate over public water fluoridation.
[4] On this issue Diesendorf has authored several papers, including a major 1986 article entitled "The mystery of declining tooth decay" in the journal Nature, examining the need for a scientific re-evaluation of fluoridation, and has highlighted some of the contrary evidence.