Meet Our Team

All Summit Center professionals believe that building trusting relationships with our clients is the foundation of our work, and we are dedicated to focusing on a strengths-based approach to help our clients reach their fullest developmental potential.

Our talented and experienced doctors, evaluators, and other service providers work out of our offices in Northern California (Walnut Creek) and Southern California (Torrance).

Daniel B. Peters, Ph.D.

Executive Director

Co-Founder

Licensed Psychologist,

PSY 16823

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Michelle L. Freeman, Psy.D.

Associate Director
Director of Assessment

Neuropsychologist, PSY 23888

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Gabriela Bronson-Castain

Gabriela Bronson-Castain, Psy.D.

Director of Training

Licensed Psychologist,

PSY 23904

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Susan Daniels, Ph.D.

Co-Founder

Professor Emerita 

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Evaluations

Katherine EngKatherine Eng, Ph.D.

Licensed Psychologist,

PSY 21108

Research Coordinator

Supervising Psychologist

Walnut Creek

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Amy Parlin FeldmanAmy Parlin Feldman, M.Ed.

Licensed Educational Psychologist

LEP #3900

Certified Autism Specialist

Walnut Creek

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Lisa L. Hancock, Ph.D., MBA

Licensed Clinical Psychologist

CA – PSY 31333 / NV – PY1035

Certified Autism Specialist

Torrance

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Courtney Hansen, Psy.D.

Licensed Psychologist/

Neuropsychologist

PSY 33837

Walnut Creek

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Jeannie M. Lopez, Ph.D.

Licensed Psychologist/

Neuropsychologist,

PSY 18357

Walnut Creek

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Lisa Nakamura, Psy.D.

Licensed Psychologist,

PSY24188

Walnut Creek

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Jenna Ouye, Ph.D.

Licensed Psychologist,

PSY26489

Walnut Creek

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Lisa White, Ph.D.

Licensed Psychologist,

PSY 26400

Supervising Psychologist

Walnut Creek

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Counseling & Consultations

Jeannie M. Lopez, Ph.D.

Licensed Psychologist/

Neuropsychologist,

PSY 18357

Walnut Creek

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Mona Mardini, Psy.D.

Licensed Clinical Psychologist, PSY31477

Walnut Creek

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Ginny Ritchey, Ph.D.

Licensed Psychologist, PSY 26238

Walnut Creek

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Cyrell Roberson, Ph.D.

Credentialed School Psychologist

Psychological Associate, PSB 94024338

Supervised by Katherine Eng, Ph.D., PSY 21108

Walnut Creek

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Loraine Van Tuyl, PhD, CHT

Licensed Psychologist,

PSY18317

Walnut Creek

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Lisa White, Ph.D.

Licensed Psychologist,

PSY 26400

Supervising Psychologist

Walnut Creek

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Paula Wilkes, Ph.D.

Coach and Consultant

Virtual

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Educational Services

Deanna M. Kim, M.Ed.

Educational Therapist

Virtual

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Training Program

Sammy DeVincent, M.A.

Practicum Trainee

Supervised by Mona Mardini, Psy.D., PSY 31477 and Jenna Ouye, Ph.D., PSY 26489

Walnut Creek

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Briana English

Practicum Trainee

Supervised by Katherine Eng, Ph.D., PSY 21108

Walnut Creek

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Rachel Murley, M.S.

Practicum Trainee

Supervised by Mona Mardini, Psy.D., PSY 31477 and Lisa White, Ph.D., PSY 26400

Walnut Creek

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Delaney Wells, M.A.

Practicum Trainee

Supervised by Michelle Freeman, Psy.D., PSY 23888

Walnut Creek

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Administration Team

Lynne Bland

Office Administrator

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Diana Hanson

Office Administrator
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Shelly Jeffra

Operations Manager

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Michelle Mortara

Information and Services Coordinator

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Elizabeth Shook

Communications Manager

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