Justin was born in Bellville, South Africa in 1974. After completing his PhD thesis on the PK of rifampicin, isoniazid, and pyrazinamide at the University of Cape Town in 2004 (following a BSc (Hons) and an MSc in the pharmacoeconomics of malaria), Justin moved to Sweden to join Uppsala University as a postdoctoral researcher, where he worked on modelling techniques for describing disease progression in acute stroke and a multiple-dose implementation of the transit absorption model, as well as developing tools for visual and numerical predictive checks. Justin began his industry career when he joined Novartis in Basel in 2006, where he provided pharmacometric support for projects in respiratory disease and oncology; at the same time, he played a central role in launching the DDMoRe consortium. Justin joined Exprimo in 2010, and while there, amassed considerable experience in a wide range of therapeutic areas and modelling applications before leaving to join the newly-founded Occams in late 2015.
Justin is the developer of the open-source NONMEM project management tool Census, is part of the nlmixr development team, has been a co-developer of Xpose, and co-led the team developing DDMoRe's pharmacometric workflow standards.
Justin is an active member of ISoP, having been a member of its Board of Directors since 2016. During this time time he has served as Secretary of the Executive Committee, chair of the Standards and Best Practices Committee, and chair-elect of the Nominations Committee. Justin assumed the role of President-Elect in October 2017, and began his term as President of ISoP in October 2018.
He has also been active in the organisation of the PAGE meeting since 2013. Justin lives in Germany.