Steve Zamarripa, MBA

President / Chairman of the Board

Diahann Klein, MA, LMFT

Chief Executive Officer

Steve and Diahann understand that they are only as good as their team and that there is no substitute for experience. In turn, they have worked hard to acquire the most talented, seasoned and passionate treatment professionals in the field. They are immensely proud of the La Ventana multi-disciplinary treatment team which consists of some of the most dedicated, compassionate and highly trained treatment professionals, perfectly poised to treat those struggling with mental health, chemical dependency and co-occurring issues. The client-to-staff ratio is low so as to be able to offer depth of personal connection, individualized support, and accountability at every step. The staff are a close knit team in constant communication, hypervigilant about each client’s unique needs upon admission, throughout their stay, and after they launch back into life. The staff understand the clinical interventions and overall care required for a successful treatment experience as well as the aftercare planning necessary to be able to sustain long-term recovery. Once a client admits, they genuinely become part of the La Ventana family and staff will do everything in their power to not let their family member fall.

Carol Kiriakos, MD

Medical Director

Rick Campa, MD


Sharon Volner, LMFT

Clinical Director, Thousand Oaks

Karla Barnett, LMFT

Clinical Director, Mental Health Programs

Kere Blair, LMFT

Clinical Director, Santa Monica

Gwendolyn Casella

Director of Detox & CD Programs

Kristi Kettle

Director of Clinical Outreach

Marcelina Gates

Admissions Manager

Kelley Kyzer

Admissions Specialist

Tony Gomez

CD Residential Program Manager

Carrie Massi

CD Program Manager

Christine Kelly

Residential Detox Manager

Saeed Shakeraneh, LMFT

Therapist, CD Programs

J. Cuervo Sosa, AMFT-CADC-II

Therapist, Mental Health Programs

Melany Schulman

Mental Health Housing Manager

Paige O’Shea, MS, AMFT

Therapist, Mental Health Programs

Wendy Roehr, AMFT

Therapist, CD Programs

Jennifer Enriquez, AMFT


John Mews, NMT, MA, MFTI

Music Therapist

Lahila Oppenheimer

Sound Bath Healer

Jimena Tobon

Yoga Instructor