Mike Rizzo, LMFT, CSAC

Clinical Program Director

Mike has worked in the substance use field since 2002. He previously worked at the Los Angeles LGBT Center as the Manager of Addiction Recovery Services/Crystal Meth Recovery Services, and as the Program Director for Alternatives and Rainbow Bridge Community Services. Mike received his certification as a Drug & Alcohol Counselor from LA City College, and holds his B.A. in Liberal Arts from Salem State University.

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Mardet Homans

Director of Operations

Mardet Homans, Director of Operations, is a recent graduate of Columbia University with a BA in psychology. In college, her focus was in abnormal psychology with a concentration in examining the neurological basis for clinical disorders. She plans to continue her education in addiction and psychology studies.

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Robert Lien, MHA

Director of Admissions

Robert Lien has helped families and individuals seeking treatment services since 2003. While working as the Manager of Patient Access Services for the Hazelden Betty Ford Foundation he completed a Master of Sciences degree in Health Services Administration with a thesis on access to mental health services at hospital emergency departments.

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Nicolle Walters

Community Outreach Coordinator

Nicolle Walters is the Community Outreach Coordinator at CAST Centers. Her role consists of developing relationships with a variety of providers and clinicians, connecting clients with resources in the community, and facilitating Alumni events and activities.

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Dr. Jorge Rodriguez

Medical Director

Jorge E. Rodriguez M.D (“Dr. Jorge”), Medical Director at CAST Centers, is a medical doctor with a specialization in Internal Medicine and Gastroenterologist. He is the proud author of two best-selling books: The Acid Reflux Solution and The Diabetes Solution. Dr. Jorge can often be found as a medical expert on various media outlets including CNN, The Doctors, The View, The Today Show and many others.

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Robert LienClinical Staff
Patrick O'Neil, RADT, MFA

Group Facilitator

Patrick O’Neil is CAST’s Group Facilitator. He previously worked in treatment as a primary residential drug and alcohol counselor in San Francisco. It was during this time that he realized that nurturing and cultivating one’s passion is an integral and essential part of recovery.

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Jackie O'Brien

Manager of Lifestyle Coaching and Case Management

Jackie's role at CAST is multi-faceted. As a Case Manager she helps her client's build their road map back into a meaningful and productive life. She earned her B.S. in Psychology from University of Georgia and has recently completed her continued education for drug and alcohol counseling at Loyola Marymount University.

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Amelia Harmon, ASW


Amelia Harmon, ASW is a clinical therapist at CAST. She received her Master’s degree in Social Work from USC with an emphasis on recovery from mental illness and her Bachelor’s degree in Psychology with a focus on personality and psychopathology from Emory University in Atlanta, Georgia.

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Robert LienClinical Staff
Erin O'Brien

Office Manager

Erin received her BA in film at the University of Tampa. While working on TV shows that focused on nuanced portrayals of mental health, Erin discovered a greater desire to help people reclaim their own mental health and is now pursuing her master’s degree in Clinical Psychology at Pepperdine University.

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