Dr. Fields is a physician researcher and adolescent medicine subspecialist with clinical and research interests in the treatment and prevention of HIV and other sexually transmitted infections (STIs) in adolescent/young adult populations. He began his training in research and public health while completing a Master of Public Health at Columbia University Mailman School of Public Health. He continued his education and training in the Medical Scientist Training Program at Johns Hopkins where he earned his Medical Doctorate and his Doctorate in Philosophy from the School of Medicine and Bloomberg School of Public Health respectively. He completed pediatric residency training at Boston Children’s Hospital and Boston Medical Center and his subspecialty fellowship training in adolescent medicine at Johns Hopkins. In addition to the clinical interest described above, Dr. Fields also provides primary care and subspecialty consultative care to adolescents and young adults in Harriet Lane Program of the Johns Hopkins Children’s Center. His research focuses on using mixed methodologies to understand and reduce HIV disparities among adolescent and young adult African American, gay, bisexual and other men who have sex with men. He currently has an NIH funded grant employing both qualitative and social network analysis to understand the role of physical and internet-based sex partner meeting venues on sexual networks and HIV risk among young Black MSM in Baltimore. In the Center for Child and Community Health Research he is an investigator in the collaborative work with the Baltimore City Health Department to identify high HIV transmission areas among MSM in Baltimore City through the use of HIV and STI surveillance data and to enhance existing testing and linkage to care strategies to increase case finding among those at highest risk.