Mark graduated with a BVSc (Hons) from Sydney University in 2003. Following graduation he worked mainly in shelter medicine for 10 years, starting with NSW RSPCA (2004 – 2009) before moving to the NSW Animal Welfare League to take on a management position (2009-2012). During this time he also volunteered for veterinary programs in Papua New Guinea, Thailand, Indonesia and India.
In 2012 he returned to Sydney University to undertake a PhD investigating feline retroviral diseases, in particular FIV vaccine effectiveness in the field and antibody response following vaccination. On completion of his PhD in 2016 (for which he was given a PhD Excellence Award for a significant contribution to his field) Mark moved to the Centre for Virus Research at the University of Glasgow thanks to an Endeavour Research Fellowship and Sydney University Early Career Mobility Scheme Grant.
He recently returned to Sydney University as an Associate Lecturer in Veterinary Microbiology and Animal Disease. Mark also co-founded Pets in the Park in 2012, a charity dedicated to providing free veterinary care to pets owned by the homeless, which now has clinics in NSW, Victoria, QLD and ACT.