Sotiris began his studies at the University of Sheffield, where he received degree in Psychology (B.Sc. in Psychology) with excellence. He continued his postgraduate studies in Counselling Psychology at the University of Sheffield, where he conducted his dissertation on smoking cessation in the workplace.
A year later, he began his second postgraduate course in Forensic Psychology, (M.Sc. in Forensic Psychology), at the University of Coventry, with a subject "500,000 homicide cases in America, and their links to gun selection". At the same time, he worked as a Psychologist in the Diavata Prison in Thessaloniki for 2 years and a year at the Abused Women Shelter.
Sotiris completed his Ph.D. at the University of Huddersfield, with a dissertation title "Narrative and personality roles of violent offenders in Greece". During his stay in the North of England he worked for the West Yorkshire Police and dealt mainly with hate crimes cases.
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