Dr. Kozak completed his PhD in microbiology and immunology at McGill University. Following this, he completed postdoctoral fellowships in viral hepatitis and zoonotic viruses at McGill and the Ontario Veterinary College, University of Guelph, respectively. He also trained at the Special Pathogens Program at the National Microbiology Laboratory in Winnipeg, where he studied viral hemorrhagic fevers and zoonotic viruses.

Currently, Dr. Kozak is a clinical microbiologist in the Shared Hospital Laboratory at Sunnybrook Health Sciences Centre, and holds an appointment at the University of Toronto. His research program focuses on SARS-CoV-2, Mpox virus, and other emerging viral infections. This includes the development of diagnostics, the evaluation of vaccines, and therapeutics.