John is a registered psychologist, registered psychometrician, and a certified specialist in assessment psychology. His practice and intensive experience center on trauma and related disorders, depressive disorders, anxiety disorders, and the like. As a psychology practitioner, John volunteered in many mental health clinics and projects like the UST Psychotrauma Clinic and psychosocial support for Taal Evacuees. He is currently a consultant psychologist at the Manila Doctors Hospital, Mindcare Center, Perpetual Help Medical Center - Las Piñas, and PsycheGuide Association, Inc., where he conducts psychotherapy and counseling, and psychological assessment for clinical and court purposes. He is currently finishing his Doctor of Philosophy major in Clinical Psychology at the University of Santo Tomas.