Lloyd Einsiedel is an Associate Professor in the Department of Microbiology and Immunology at the University of Melbourne, part of the Faculty of Medicine, Dentistry and Health Sciences. He is a qualified Medical Doctor with a PhD and Fellow of the Royal Australasian College of Physicians (FRACP). As an infectious diseases physician, Einsiedel has delivered clinical services in central Australia for more than two decades. His career includes roles as Infectious Diseases Physician at Alfred Hospital in Melbourne from February 2002 to June 2005 and at Alice Springs Hospital since May 2005. Previously, he was affiliated with the Flinders University/Northern Territory Rural Clinical School and the Baker Heart and Diabetes Institute's central Australia division. Currently, he serves as a Medical Doctor at the Peter Doherty Institute for Infection and Immunity.

Einsiedel's research focuses on viral infectious diseases, particularly Human T-Lymphotropic Virus type 1 (HTLV-1) subtype C, which is endemic among Aboriginal people in remote central Australian communities. His cross-sectional community surveys have revealed very high HTLV-1c prevalence rates, associations with bronchiectasis, pulmonary disease, bloodstream infections, diabetes, chronic kidney disease, and strongyloidiasis, as well as higher proviral loads linked to these conditions. Notable publications include 'Very high prevalence of infection with the human T cell leukaemia virus type 1c in remote Australian Aboriginal communities: Results of a large cross-sectional community survey' (2021), 'Pulmonary Disease Is Associated With Human T-Cell Leukemia Virus Type 1c Infection: A Cross-sectional Survey in Remote Aboriginal Communities' (2021), 'High level of genomic divergence in orf-I p12 and hbz genes of HTLV-1 subtype-C in Central Australia' (2024), 'Combination antiretroviral therapy and MCL-1 inhibition mitigate HTLV-1 infection in vivo' (2025), and 'Bloodstream infection rates in Aboriginal and non-Aboriginal people in Central Australia, 2014-2018' (2023). With over 75 publications and more than 2,000 citations, his work has influenced public health. Einsiedel collaborated with the National Aboriginal Community Controlled Health Organisation HTLV-1 committee and Australian Department of Health to secure World Health Organization classification of HTLV-1 as a Threatening Pathogen to Humans in 2021, prompting international transmission reduction policies and Central Australian clinical guidelines.