Logo for Keystone Psychological Services featuring an abstract keystone shape with a yellow accent above the company name.

Who We Are

At Keystone, we strive to provide evidence-based, meaningful, and effective clinical psychological services.

We offer a range of services to cater to a variety of clients, including police officers and firefighters, adults, children, adolescents and their parents, as well as hospitals and care management organizations (CMOs).

Our vision remains consistent through our expert team, achieving proven results for psychological wellness and knowledge distribution.

Dr. Mullen left, Kristen middle, Dr. Diaz right

Meet The Team

Dr. Dias with short, blonde, curled hair, wearing a white dress shirt and dark blue dress bants, crossing her arms smiling at the camera

Dr. Ingrid Diaz, Ph.D.

PSYCHOLOGIST & OWNER

Dr. Mullen with dark straightened hair, sitting on a white couch, posing for the camera over the armrest, wearing a black pantsuit

Dr. Elizabeth Mullen, Psy.D.

CLINICAL PSYCHOLOGIST

Natan with no head hair and a red short beard, smiling at the camera, wearing a grey blazer and glasses

Natan Schneider-Gans, LPS, ACS

THERAPIST

Kristen with dark curly styled hair, sitting in a white chair, posing over the arm and wearing a blue pantsuit

Kristen Ortiz

SENIOR RESEARCH ASSISTANT

Let’s Work Together

Send us a note or give us a call, letting us know what services you are interested in. We’ll get back to you as soon as we can!

Email: info@keystonepsych.com
Call Us:
(732) 718-4873