Feargus graduated from Royal Holloway in 2016 with a First Class Honours Degree in Computer Science with a specialism in Information Security. Throughout his university degree he also worked for a leading financial data automation firm, first as a Software Engineer and later as their Software Security Group Lead.

In September 2016, Feargus joined the Centre for Doctoral Training in Cyber Security where he started work with the Systems Security Research Lab. His current research interests involve combining machine learning techniques with program analysis to tackle issues in mobile security, particularly those afflicting the Android operating system.