Before being appointed Dean of Faculty, Don lectured in Pharmacology and Biochemistry within the Department of Life and Physical Sciences between 1993 and 2009, and served as Head of that Department between 2009 and 2014.
He has supervised a number of undergraduate and funded postgraduate research projects in the area of biological membrane transport.
Don holds a BSc (Hons) and a PhD in Pharmacology from University College Dublin, an MSc in Pharmaceutical Analysis from Trinity College Dublin and a Postgraduate Certificate in Third Level Teaching & Learning from Technological University Dublin.
He also served as a ministerial appointee to the Board of the Nursing and Midwifery Board of Ireland between 2022 and 2025.