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Leadership Team

Leadership Team

Leadership Team

La Amistad Behavioral Health Services prides itself on its experienced and dedicated leadership team, including:
Rodney Letterman

Rodney Letterman, L.C.S.W., Chief Executive Officer

Rodney Letterman is La Amistad Behavioral Health Services’ Chief Executive Officer. He is a Licensed Clinical Social Worker with a master’s degree in social work from Temple University in Philadelphia and joined La Amistad in September 2009.

Mr. Letterman has nearly 20 years of clinical and operations experience in the behavioral health sector, including 12 years in acute care in Wilmington, Del. He held various clinical and administrative positions, including Director of Clinical Services, where he had clinical oversight and supervision for the child, adolescent and adult inpatient programs, as well as the partial hospital programs. He also worked extensively with the State of Delaware’s Division of Mental Health and Substance Abuse in developing a dual-diagnosis inpatient program for indigent adults.

Carlos H Ruiz MD

Carlos H Ruiz MD, Medical Director

Diplomat of the American Board of Psychiatry and Neurology Diplomat of the American Board of Addiction Medicine Carlos H Ruiz MD is a bilingual psychiatrist currently pursuing interests in clinical psychiatry, addiction medicine and administrative roles.

A native New Yorker, he received his MD degree in 1991 at the State University of Buffalo School of Medicine and Biomedical Sciences. He completed his psychiatric residency in 1995, at the New York State Psychiatric Institute, Columbia University College of Physicians and Surgeons. He has served as an active member of the Department of Psychiatry at Florida Hospital in Orlando for the past 14 plus years as medical director of PsychMed, a highly specialized inpatient unit that manages both acute Psychiatric and comorbid medical problems. He is currently the Chairman of the Department of Psychiatry at Florida Hospital, from 2010 – present.

Academically he serves as Assistant Clinical Professor of Psychiatry at the Florida State University School of Medicine and is actively involved as a preceptor for residents and medical students. His passion is for community-based approach to treatment to mental illness. Treatment targeted for the whole person thru individual therapy, group and family therapy and the latest advances in medication assisted treatment. His future hope is to see parity for mental health coverage and greater access to substance abuse treatments.

Dr. Buchholz

Robert Buchholz, M.D., Medical Director of Adult Services

Dr. Robert Buchholz is Board Certified in adult psychiatry. He joined La Amistad as a full-time staff psychiatrist in 2006, attending adult clients in the residential and partial hospitalization programs.

Having treated clients in private practice for more than 25 years in Fort Myers, Fla., Dr. Buchholz has extensive experience in both outpatient and inpatient psychiatry. He founded the Psychiatric Center of Florida and served as medical director of another behavioral health hospital in Florida for 16 years.

Alison G. Weiss, M.D., Child, Adolescent, and Board Certified Adult Psychiatrist

Dr. Alison G. Weiss is a Child, Adolescent, and Board Certified Adult Psychiatrist who joined La Amistad in 2020. A second generation Floridian, Dr. Weiss was born in Miami and raised in Ft. Lauderdale. She attended undergraduate at The University of Florida where she earned her Bachelor’s of Science degree in Neurobiological Sciences. Dr. Weiss then attended the University of Miami Miller School of Medicine where she earned her M.D. in 2014. Dr. Weiss spent the next 6 years in Chicago where she completed her Adult Psychiatry residency and Child and Adolescent Psychiatry fellowship at Northwestern University and the University of Illinois at Chicago, respectively. As an attending psychiatrist at Compass Health Center Chicago, Dr. Weiss furthered her experience diagnosing and treating individuals throughout the lifespan with severe mental illness. Dr. Weiss has developed a passion for treating individuals in long term settings due to the time it affords her to get to know her patients on a deeper level to meet their individual needs. Dr. Weiss is thrilled to finally be back in Florida where she can bring her training and expertise in psychiatry back to her home state.

Brain Sellers

Brian Sellers, L.C.S.W., Director of Clinical Services

Brian Sellers serves as the Director of Clinical Services of La Amistad Behavioral Health Services and has acted in a clinical leadership role at La Amistad since 2001. He manages all aspects of clinical programming and supervises all clinical staff associated with the care of La Amistad clients.

Brian began his career working as a suicide/crisis counselor in Gainesville, Fla., where he received an undergraduate degree in psychology from the University of Florida. He received a master’s degree from the University of Central Florida and began working at a nonprofit community mental health center. Brian specialized and received training with child/adolescent issues, chemical dependency, in-home therapy and adult day-treatment programs. Brian set up programs at the local homeless shelter for children/adolescents and utilization review and became a patient advocate with the Orlando State Attorney’s Office.

Desiree Martin

Desiree Fouse, LMHC, Risk Manager and Quality Improvement

Desiree Fouse is the Program Manager at the Maitland campus for adolescents. Desiree is a Licensed Mental Health Counselor and received her education credentials in clinical mental health counseling from Stetson University. She has been with La Amistad since 2009 in various disciplinary roles.

Prior to working in residential care, Desiree worked at Stetson University as a Residential Life Coordinator as well as a crisis responder to the University. She developed wellness programs for college students to assist with emotional needs and supervised staff to ensure safety for residents. Desiree has ongoing certifications in DBT, Sand Tray Therapy, Verbal De-escalation Training, Attachment, as well as extensive training in various therapeutic techniques that assist with emotional regulation for adolescents as well as adults. She specializes in children and adolescent psychiatric disorders, traumatic stress symptoms, personality disorders, chemical dependency, attachment issues, and parenting skills including family therapy. She has worked with children as young as five years of age to late adulthood.

Tim Haubrock , Director of Education

Tim Haubrock serves as the Director of Education of La Amistad Behavioral Health Services. He holds a professional teaching license from the State of Florida in Exceptional Student Education and Educational Leadership, grades kindergarten through 12th. As an educator, he brings seven years of experience working with a wide variety of students with various exceptionalities. Tim started his career in Cincinnati, Ohio, where he began as an exceptional education teacher. After this, Tim worked as a school-based administrator and athletic director. Upon moving to Florida, he worked in higher education to help fellow educators achieve advanced degrees. Tim earned a Bachelor of Science in Special Education, a Master’s in Educational Leadership and a Graduate Certificate in Special Education Leadership, all from the University of Cincinnati. Tim has a passion for working with students to help them achieve their full potential so that they’re prepared to be lifelong learners.

Devon Kriebel, Facility Risk Manager and Performance Improvement

Devon Kriebel , Director of Nursing

Devon Kriebel brings 14 years of varied experience working in the mental health field. He received his Registered Nursing License in 2006. Devon has held various roles within the mental health field such as Mental Health Technician, working as a floor nurse and charge nurse and then Director of Admissions. Devon came to La Amistad in 2014 when he was hired as the Director of Utilization Review. Since that time Devon has obtained accreditation as a Licensed Healthcare Risk Manager through the State of Florida after completing the Risk Manager Program at the University of Central Florida. He now serves in the role of Facility Risk Manager and Performance Improvement at La Amistad.

Over the span of his career, Devon has obtained an understanding and experience in all levels of care including inpatient, residential and outpatient services. Devon has also demonstrated his ability to teach and foster partnership among employees and different departments to improve the overall performance in delivery of quality services.

Mariel Johnson

Mariel Johnson , Program Social Service Manager for the Adolescent Programs

Mariel Johnson is the Program Manager at the Maitland campus for adolescents. Mariel is a Licensed Mental Health Counselor and received her clinical training at the University of Central Florida’s Mental Health Counseling and Marriage and Family Therapy master’s program. She has been with La Amistad at various time, and in different roles since 2011. Prior to her role at La Amistad, Mariel attended St. Leo University for her undergraduate degree, and received a master’s in Marriage and Family therapy at UCF in 2012. While pursuing her master’s degree, Mariel worked at the Marriage and Family Research Institute, working alongside leading researchers on the development of effective interventions for couples and families. She has owned and managed her own private practice since 2013, in acute behavioral health hospitals, in residential treatment programs and has worked at a private outpatient community mental health company as their clinical program as therapy program manager for a number of years. Mariel is a qualified mental health counseling and marriage and family therapy supervisor, registered with the state of Florida, and has been offering clinical supervision and consultation to a number of counseling interns since 2016. She is trained in Prolonged Exposure Therapy, Eye Movement Desensitization and Reprocessing, and integrates DBT, CBT, and various other interventions to treat the spectrum of Trauma, Anxiety and Impulse Control disorders. Mariel also enjoys working with SCD and high functioning ASD clients, adolescents, personality disorders and working families, offering parenting skills.

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