Gillett is a lecturer in the discipline of Philosophy in the School of Humanities at Macquarie University, Sydney. Primarily a philosopher of science, he has experience working in interdisciplinary groups alongside cognitive scientists, anthropologists, biologists, and psychologists. His research interests include the impact of spatial cognition technologies on human wayfinding capacities, enculturated and distributed cognition, cultural evolution, and the methods by which scientists investigate minds. Gillett received his PhD in Philosophy at Macquarie University in 2018 working on a conceptual analysis of distributed cognition. He has been teaching in the discipline since 2018, covering critical thinking, philosophy of science, and philosophy of psychology. From 2022 to 2025 he was involved in a John Templeton Foundation project, Concepts in Dynamic Assemblages. As of 2026 he is working in the Bio-Innovations project: The Listening Brain.