Malcolm Caulfield has spent most of his working life as a scientist. He qualified as a lawyer in 2002, and fairly shortly after that became involved in animal welfare matters. He was Animals Australia's first lawyer, and he wrote the first textbook on animal welfare law in Australia.
He has been actively involved in animal welfare law and science, with several publications in those areas. He is Principal Lawyer at the Animal Law Institute and an Honorary Research Fellow in the School of Humanities and Social Inquiry at the University of Wollongong.