Greta has completed a Masters in Clinical Psychology, a Graduate Diploma in Social Science (Psychology) and a Bachelor of Arts with Honours (Psychology). Her Honours thesis explored The Role of Achievement Goals, Self-Efficacy and Competence Satisfaction in the Relationship Between Self-Handicapping and Mental Health Symptoms, while the subject of her Masters thesis was the Factors Contributing to Acculturative Stress in Refugee and Migrant Adolescents.

Greta is a full member of the Australian Psychological Society and a Fellow of the College of Clinical Psychologists.