Penio Kassari holds a BA in Business Administration and a MA in Industrial/Organizational Psychology. She has been certified as Data Protection Officer (DPO), Adult Trainer, Systemic Analyst Project Management Professional and trained in Project Management & Agile Project Management, as well as in Business Analysis. Her professional experience has been focused in the field of "Human Resources", with emphasis on Recruitment, Personnel Development & Performance Appraisal, "Quality Assurance" (Certified Inspector for ISO 9001, OHSAS 18001, Internal Audit), "Business Development" and in particular Corporate Communications & Marketing, Customer Service, Contracts & Administration, and in "Healthcare Management". During 2009-2012 she coordinated the Program for the "Registry of Patients with Primary Immunodeficiency in Greece", Department of Immunology & Histocompatibility, Center for Primary Immunodeficiencies – Paediatric Immunology, "Aghia Sophia" Childrens’ Hospital. Since November 2012, she has been coordinating the Program "Development of a National System for the Prevention & Management of Overweight and Obesity in Childhood and Adolescence in Greece". In the BigO project, she serves as Clinical Evaluation Study Coordinator (Outpatient Clinic for the Prevention and Management of Overweight and Obesity in Childhood and Adolescence, Division of Endocrinology, Metabolism and Diabetes, First Department of Pediatrics, National and Kapodistrian University of Athens Medical School, Athens, Greece).