Executive Leadership Team
Fabio van der Merwe, M.A., CHC
Chief Executive Officer
Fabio van der Merwe started his career with DeKalb Community Service Board in 2006 and has served in management positions in the departments of Compliance, Quality, and Utilization Management. In 2016 he joined DeKalb CSB’s Leadership Team as the Chief Operating Officer and in June 2020, he was appointed to his current position as Chief Executive Officer.
Prior to his work at DeKalb CSB, Fabio held positions in managed care, substance abuse, and other behavioral health organizations. Fabio has a B.A. in Psychology from Emory University, a M. A. in Clinical Psychology from the University of Maryland Baltimore County, and holds certification in Health Care Compliance.
Renee Dryfoos, LCSW, MBA
Chief Clinical Officer
Renee joined DeKalb Community Service Board in 1999 and has served as Director of DeKalb Addiction Clinic, the Director of Winn Way Mental Health Clinic and the Director of QI/UM and Staff Development prior to her current position of Chief Clinical Officer.
Renee has a B.A. in Psychology from the University of Miami, a M.A. in Human Services from Nova Southeastern University, a M.S.W. from the University of Georgia, and an M.B.A. from Mercer University. Renee has over 25 years of experience with a continuum of care in behavioral health and substance abuse organizations including public and private hospitals, not-for-profit substance abuse residential and day programs and DeKalb Community Service Board services.
Chief Financial Officer
Jock served as the Controller of DeKalb Community Service Board since January 2018 and was promoted to Chief Operating Officer in January 2022.
His over 20 years of experience in finance includes serving as the Controller, Accounting Manager and Budget and Reports Analyst for Behavioral healthcare organizations. Jock holds a Bachelor of Science in Accounting from Albany State University.
Chatele' Chester, M.Ed, M.S.Ed, CHC
Chief Quality and Compliance Officer
Chatele’ joined DeKalb Community Service Board in June of 2021 as the Chief Quality Officer. Chatele’ has over 15 years of experience in the area of performance and quality improvement in the behavioral health and human service fields, with over 10 years in quality improvement leadership.
Chatele’ holds a Bachelor of Science degree in Applied Psychology from the Georgia Institute of Technology and a Master of Education degree from Strayer University, with additional studies in the specialization of Training and Performance Improvement from Capella University.
Carmen Sofia Martinez Villar, MD.
Dr. Martinez joined DeKalb Community Service Board in 2012 and has served as psychiatric support for all our addiction programs as well as the Winn Way Clinic. In June 2020, Dr. Martinez was appointed to her current position as Medical Director and since has provided the agency with extensive consultation and direction in relation to our ongoing service delivery.
Dr Martinez completed her Doctor Of Medicine at Instituto Tecnologico de Santo Domingo and her General Psychiatry Residency at Drexel University College Medicine. She is Board Certified in Psychiatry and Addiction Psychiatry with the American Board of Psychiatry and Neurology.
Vice President of Developmental Disabilities
Larry joined the Dekalb Community Service Board in July of 2022 as the Director of Developmental Disabilities. Larry has over 16 years of experience within Behavioral Health, Substance Abuse, Crisis Call Center Supervision, and Developmental Disabilities. More specifically, Larry has four years of experience with serving as a Program Manager for a Developmental Disability Crisis Home (Out-of-Home Services), Organizing and Leading IDD Intensive-In-Home Support Services, and serving as the Program Manager for a Behavioral Health Intensive Treatment Residence.
Larry holds a Bachelor of Arts in Psychology and a Master of Arts in Professional Counseling.