Dr. Thomas was born in Wales and moved to Canada while still in high school. She completed a BSc (Summa cum Laude) and a National Research council supported MSc in pure mathematics at McMaster University in Canada. She then turned to computing, and worked for a few years in industry, before returning to academia and receiving an MSc at Southern Illinois University in the US.
She was a Professor of Computer Science at Carroll University in the US for many years, before completing her PhD in Software Engineering at Aberystwyth University in 1995.
Dr. Thomas was appointed Teaching Fellow at Aberystwyth in 1999 and Senior Lecturer in 2014. Her research interests centre around problem solving and Computer Science education.