LSJ is an expert in genome bioinformatics, devoting much of his attention to developing better strategies, protocols, methods and tools for research in molecular phylogenetics.

Lars Jermiin is a Visiting Professor at the School of Biology and Environmental Science, University College Dublin, and an Honorary Professor at the Research School of Biology, Australian National University.

He holds an MSc (population genetics) from the University of Aarhus, Denmark (1989) and a PhD (molecular evolution) from La Trobe University, Australia (1994). He did postdoctoral research at La Trobe Univerity (1994-1995), Université d'Ottawa (1995), the Australian National University (1995-1998), and the University of Sydney (1998-2001).

In 2001 he was appointed to the position of Lecturer at the University of Sydney, then promoted to Senior Lecturer in 2004, and Associate Professor in 2008. In 2002 he co-founded the Sydney University Bioinformatics & Technology Center (SUBIT), and in 2003 was appointed its Director (2003-7). In 2009 he was appointed by the Commonwealth Scientific Industrial and Research Organisation's (CSIRO) of Australia to establish and lead a research team in genome bioinformatics at its Division of Entomology. In 2016 he was appointed Honorary Professor at the Australian National University, and in 2018 he was appointed Visiting Professor at the University College Dublin.