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Center for Adolescent Health

Our Team 

Along with members of our advisory boards, the Center for Adolescent Health is composed of a team of faculty, staff and affiliates dedicated to improving the health and well-being of young people in urban environments. Faculty are available for interviews upon request by contacting the Bloomberg School's marketing and communications team

Tamar Mendelson

Tamar Mendelson, PhD


Bloomberg Professor of American Health

Research interests: mental health, opportunity youth, urban youth, school-based prevention programs, mindfulness and yoga, mental health during pregnancy and post-partum  

Beth Marshall

Beth Marshall, DrPH

Associate Director

Research Core Co-Lead

Assistant Scientist

Research interests: youth risk behaviors, school-based health programs, schools and health, health education, youth development, teen pregnancy prevention


Gabriela Calderon

Program Officer

Katrina L. Brooks

Katrina Brooks, MHS

Community Outreach Core Lead

Community Relations Director


Renee Johnson

Renee M Johnson, PhD, MPH

Associate Professor

Research interests: emerging adults, substance use epidemiology, vulnerable populations

Kristin Mmari

Kristin Mmari, PhD

Research Core Co-Lead

Associate Professor

Research interests: opportunity youth, early adolescents, gender norms, monitoring and evaluation 

Melissa Davey-Rothwell

Melissa Davey-Rothwell, PhD

Translation and Dissemination Core Lead

Associate Scientist 

Research interests: HIV/AIDS, drug abuse, implementation science, dissemination, urban health

Todd Wilson

Toddy Wilson, MPP

Communications Core Lead

Communications Specialist

Terri Powell

Terri W. Powell, PhD

Associate Professor

Research interests: adolescent health prevention and promotion research, community-engaged research; implementation science, qualitative methodologies


Maria Trent

Maria Trent, MD

Bloomberg Professor American Health 

Director, Adolescent Medicine Fellowship Program, Johns Hopkins School of Medicine

Research interests: sexual and reproductive health, sexually transmitted infections, pregnancy prevention/contraception, health disparities, adolescent access to clinical services, school health services, randomized controlled trials, the impact of racism and other forms of discrimination on youth development 

Phillip J. Leaf, PhD

Philip J. Leaf, PhD

Senior Advisor

Emeritus Director


Research interests: mental health, youth violence prevention, trauma-informed practices and interventions, program implementation

Freya Sonenstein

Freya Sonenstein, PhD

Emeritus Director

Cheryl Alexander

Cheryl Alexander, RN, PhD (1945-2006)

Center Founding Director