Efrosini holds a Bachelor of Arts in Criminology and Criminal Justice, with a concentration in Psychology, from Carleton University. She has worked as a criminologist and has over 20 years of experience in the field, having worked primarily with adult male offenders in both provincial and federal jurisdictions. Her work focused on rehabilitation, reintegration into society, and assessing and managing the level of risk individuals may pose to the community. Throughout her career, she also mentored many professionals entering the field.

Efrosini has been teaching at John Abbott College since 2024.