Carl Latkin, PhD
Principal Investigator and Professor
clatkin@jhsph.edu
Amy R. Knowlton, ScD, MPH
Associate Scientist
aknowlto@jhsph.edu MPH, Johns Hopkins Bloomberg School of Public Health
ScD, Department of International Health, Johns Hopkins Bloomberg School of Public Health
Karin Tobin, PhD
Assistant Scientist/Project Director
ktobin@jhsph.edu Dr. Tobin is an assistant scientist with the Department of Health, Behavior and Society. Her research interests include examination of the social and contextual factors associated with substance abuse and HIV risk, particularly with marginalized populations. She is currently involved with several NIDA and NIMH funded social-network oriented behavioral interventions with high-risk adults (domestically and internationally), investigation of risk factors associated with drug overdose and witness responses and translation of the SHIELD intervention for national dissemination. What I enjoy most about my job is the diversity of my responsibilities. I enjoy interacting with participants and learning about ways to help communities that are affected by HIV.
Melissa A. Davey-Rothwell, PhD, MPH, CHES
Assistant Scientist
mdavey@jhsph.edu PhD, Johns Hopkins Bloomberg School of Public Health
MPH, Emory University/Rollins School of Public Health I am the Project Coordinator of the CHAT Project at the Lighthouse. Also, I am the evaluator and technical assistance coordinator for the SHIELD replication project. I have over eight years of experience working with at-risk populations in urban communities. My background is behavioral science, health education and program evaluation. My own research focuses on the role of perceived norms and communication in HIV risk behaviors.
James A. Peterson, MHS, Ed.D
Research Ethnographer/Program Coordinator
jpeterso@jhsph.edu My position at the Lighthouse involves conducting Ethnographic and Qualitative Research, Coordinating and Managing various staff activities. I interact with the community and work with people and agencies in various capacities. This position provides many opportunities to introduce creative ideas and contribute to implementation of innovations that lead to the development of interventions, which aim to mitigate the problems of the inner city neighborhoods. | 
