Joseph G. Marquez is a registered psychologist and psychometrician. He is a PhD candidate in Clinical Psychology who specialize in Child and Adolescence, and Trauma Psychology. He has been practicing in the clinical field for more than 15 years now. Furthermore, he practices psychotherapy and counseling for various age groups.

Currently, he has his own private practices in Taytay Rizal and Quezon City. He is partnered with LGUs in Rizal province in providing  mental health services and support to the community.

He has a certification as a Mental Health First Aider. Likewise, he also has a DOH Certification as HIV Counselor and a practicing Trauma Specialist. He is a CBT specialist in depression and substance abuse. He is Certified Specialist awarded by the Psychological Association of the Philippines in Clinical, Assessment, and Counseling Psychology.