Our Staff

Clinical Team

Christian Castaneda, LCSW

Clinical Director

Christian is a licensed clinical social worker and a certified trauma focused cognitive behavioral therapist who specializes in treating addiction, trauma, depression, anxiety and other mental health issues. In leading our clinical team, Christian utilizes his multi-modality clinical focus and certification in the Seeking Safety model of treating substance abuse and trauma.

Christian joined our team from Promises Treatment Center’s program director and prior to that dedicated three years as lead clinical specialist at Huntington Hospital.

His astute attention to client care and family focus is truly impactful on staff culture and the clients’ recovery experience at ASAP Rehab.

Heshan Wijegunaratne, MHS

Compliance Officer

Heshan comes from a medically-trained background in the fields of psychiatry and addiction. He also has a Masters in Health Science, and broad work experience in both inpatient psychiatric hospitals and in residential rehabilitation facilities. 

In November 2016, Heshan joined our team as a program director, and after 1 year, he took over the position of compliance officer in order to enforce ASAP Rehab’s acclaimed JCAHO accreditation certification recognition. His attention to detail, knowledge of mental health, experience working in a variety of departments at ASAP Rehab, and a passion for helping individuals with addiction issues makes him a versatile and valuable member of our team. 

Jessica Madrigal, LVN


Jessica Madrigal moved from central California to the Los Angeles area to pursue a career in nursing. She graduated from St. Francis Career College and has been a state certified Licensed Vocational Nurse since 2012. She first started her career as a pediatric home health nurse. In November 2016, she became the lead nurse at Alcohol and Substance Program. She is currently furthering her education to become a Registered Nurse. Her great passion is to provide excellent individual care and help those who have been through traumatic/stressful situations. 

Recovery Support Team

Leslie Ferrari


Leslie Ferrari moved from central California to the Los Angeles area to continue a career in  Substance Abuse Counseling. She graduated from University of Phoenix with her Bachelors of Science in Human Services in 2009.   

She first started her career as a substance abuse Counselor working for Phoenix House of California in the California Department of Corrections.  She also continued in Substance Abuse working for a non profit with group home children.   

In  2016 , she became residential Tech/Substance Abuse Counselor at Alcohol and Substance Program. She is certified under  Registered Addiction Specialist-Masters.   Her passion as a person in recovery is to provide quality services to those with addictions and co-occurring symptoms.  

Edward Segura

12-Step Counselor

There is more to be said about Eddie shortly

Ronnae Ryland, CNA

Nurse Tech

Ronnae is a Certified Nurse Assistant which was obtained in 2012. She attended Mt San Antonio College where she began the Psychiatric Technician Program to specialize in metal health as a nurse much known as LPT. While going to school full time, Ronnae worked in homecare and corrections part-time while she focused on her school and studies.

Ronnae worked two years at Arrowhead Regional Medical Center as a Nurse Tech where she gained a wealth of experience in all aspects of health before working in the treatment center field. Her focus and passion is helping others mentally, emotionally and physically while they try to progress in their recovery and has helped many on their path to addiction recovery. In her free time she enjoys time well-spent with her family and children.

Michael Gray

Executive Chef

Culinary Master, what is there to say? You can’t taste the type, you HAVE to try the bites!!

Gary Sliva

Facility Maintenance Engineer

Like the way it looks and happy that it all works? Gary is to thank for that! 

We have expert addiction-specialists standing by ready to speak confidentially with you. Call us today!