Dr. Marcell is Sr. Faculty of the MTC and an Assistant Professor of Medicine at Johns Hopkins University School of Medicine. He is a nationally recognized expert in the field of gender medicine, especially preventive health and medical services for adolescent men and young adults. He is an Assistant Professor with a primary appointment in the Johns Hopkins School of Medicine, Department of Pediatrics and a joint appointment in the Bloomberg School of Public Health, Population, Family and Reproductive Health. Since 2006, he has served as the Clinical Director of Teen services at the Harriet Lane Clinic, was the Medical Director of the Teen Clinic at the University of Maryland, and has extensive experience directing Title X services funded through the Baltimore City Health Department’s Bureau of Adolescent and Reproductive Health. Dr. Marcell’s research has focused on adolescent sexual and reproductive health and access to care from both the patient and provider perspectives. His research incorporates behavioral science, health services research, and public health practice using mixed-methodologies including focus group and in-depth interviewing techniques, person-based longitudinal data analysis and multi-level modeling. He also has experience examining large datasets including the National Longitudinal Survey of Adolescent Health, the National Ambulatory Medical Care Surveys, the National Survey of Adolescent Males and the National Survey of Family Growth. He recently completed a 5-year collaborative evaluation study with the Baltimore City Health Department’s Bureau of Adolescent and Reproductive Health on engaging young men in reproductive health care funded by DHHS, Office of Family Planning and was co-author and primary faculty member of the Leadership and Education in Adolescent Health training program. He has also been funded through the National Institutes of Health, National Institute of Child Health and Human Development career development K23 mechanism to study teen males’ barriers and access to reproductive health care, is a faculty advisor for the Adolescent Health Working Group’s Sexual Health Module Committee and the Physicians for Responsible Choice and Health’s Adolescent Reproductive Health Education Project. He has extensive experience training health professionals on topics such as STIs, adolescent health, and male health and reproductive health for Region III Title X, the Male Advocacy Network, Planned Parenthood, Physicians for Responsible Choice & Health, Adolescent Reproductive Health Education Project, and the Society for Adolescent Medicine. He is also the lead instructor for the course: “Masculinity, Sexual Behavior & Health: Adolescence & Beyond” at the Johns Hopkins Bloomberg School of Public Health.