Malcolm Walter is a Professor of Astrobiology at the University of New South Wales in Sydney. He is Director of the Australian Centre for Astrobiology based at that university, and Director of M. R. Walter Pty Ltd. He has worked for 35 years on the geological evidence of early life on Earth, including the earliest convincing evidence of life. Since 1989 he has been funded by NASA in their "exobiology" and "astrobiology" programs, focusing on microbial life in high temperature ecosystems, and the search for life on Mars. He is a member of the Executive Council of NASA's Astrobiology Institute. During 1999 his book "The Search for Life on Mars" was published by Allen & Unwin. He has published more than 100 articles and several other books. He also works as an oil exploration consultant and a consultant to museums, and was curator of a special Centenary of Federation exhibition on space exploration (for the National Museum of Australia in Canberra, Museum Victoria, and elsewhere). In 2004 Malcolm was elected a Fellow of the Australian Academy of Science.