1. Research coordinator in the Department of Pediatrics at Vagelos College of Physicians and Surgeons at Columbia University Irving Medical Center
2. Assistant professor in the Department of Pediatrics at the University of Texas Southwestern Medical Center
3. Associate professor in the Department of Pediatrics at Vagelos College of Physicians and Surgeons at Columbia University Irving Medical Center
4. Assistant professor in the Department of Biostatistics at the Mailman School of Public Health at Columbia University Irving Medical Center
5. Professor of medical psychology in the Departments of Pediatrics and Psychiatry at Vagelos College of Physicians and Surgeons at Columbia University Irving Medical Center