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Center Faculty and Staff

Mindi B. Levin, MS, CHES ®
Founder and Director, SOURCE
Faculty Appointments:
Health, Behavior and Society (primary) & Health Policy and Management (joint), Johns Hopkins Bloomberg School of Public Health
Johns Hopkins University School of Nursing (joint)

Tyler Derreth, PhD
Associate Director

Rosemary Riel
Assistant Director for Academic Service-Learning

Z. Sequean Mahnke
Assistant Director

Ezzat Shehadeh
Communications Specialist

Eryn Rich
Administrative Coordinator

Glenn L. Ross
Community Consultant

General Contact Information for SOURCE Team
(410) 955-3880  

Meet Our Team

ml-crop1Mindi B. Levin, MS, CHES ® Founder and Director


Mindi is the founder and director of SOURCE, the community engagement and service-learning center, serving the Johns Hopkins University (JHU) Schools of Public Health, Nursing, and Medicine. In this capacity, she leads the team and supports the creation of strategies to integrate public health practice and community outreach activities into academic training in the health professions. These efforts are accomplished in partnership with approximately 100 Baltimore community-based organizations, as well as faculty, staff, and students. Mindi provides programs and services that embrace the values of public service, social justice, citizenship, ethical decision-making, activism, civic professionalism, human rights, diversity, and reciprocity.

Additionally, she holds faculty appointments in the Bloomberg School of Public Health’s Department of Health, Behavior and Society (primary), the Department of Health Policy and Management (joint), and the JHU School of Nursing (joint). She teaches and supports a variety of service-learning and experiential learning courses on campus. She developed and teaches the Baltimore Community Practicum course (JHSPH) and Topics in Interdisciplinary Medicine: Health Care Disparities (SOM). She created and serves as the faculty co-sponsor of the certificate program in Community-Based Public Health. Mindi also coordinates the JHU School of Nursing’s Community Outreach Program. She worked with colleagues to develop several key SOURCE initiatives, including SOURCE Service-Learning Faculty and Community Fellows Program, SOURCE Service Scholars, Connection Community Consultants, Baltimore Action Projects, HIV Counseling and Testing, and the Identity Clinic.

A Baltimore native, Mindi earned a bachelors degree in Community Health Education from the University of Maryland, College Park and a masters degree in Health Administration from Towson University. She is a Certified Health Education Specialist.

tyler-headshotTyler Derreth, PhD - Associate Director


R. Tyler Derreth, PhD. is the associate director of SOURCE and faculty in the Department of Health, Behavior and Society at the Johns Hopkins Bloomberg School of Public Health. His administrative work centers on collaborations faculty, staff, and students as they develop community partnerships that address social issues through various academic and co-curricular experiences. These efforts include leading the SOURCE Service-Learning Fellows program, supporting service-learning course development, community partnership outreach and establishing SOURCE’s research agenda. His research concentrates on the role of universities in cities, urban community–university partnerships, critical pedagogies, and social justice-oriented educational practices. In particular, he is focused on developing equitable urban university–community partnerships through service-learning and other academic practices that center marginalized voices in a critical educational environment.

Tyler earned a BA in English at Dickinson College before returning to his hometown of Baltimore to teach middle school English. He then went on to earn his doctorate in higher education at Penn State University where his dissertation focused on developing a sociocultural framework of community-based learning that breaks down institutional hierarchies. He is thrilled to once again be home in Baltimore working with its communities.


rosemaryrielRosemary Riel - Assistant Director for Academic Service-Learning


Rosemary F. Riel is assistant director of academic service-learning for SOURCE and a longtime resident of Baltimore since 2004. She seeks ways to elevate interprofessional education through critical reflection, narrative practice, and academic collaborations that build community power and strengthen capacity for social change and health equity. Trained in applied anthropology, Rosemary centers lived experiences, community-identified impacts and assets in the administrative and programmatic aspects of her work. For over a decade her expertise in program design, monitoring and evaluation of service-learning and community-based training has emphasized managing and mentoring university students and multidisciplinary faculty, using social justice and anti-racist frameworks to nurture cultural humility and transformative learning.

Rosemary envisions a world where higher education institutions examine on-going and historical oppressive infrastructures, commit to critical understanding of identities and positionalities, and prioritize BIPOC-driven partnerships and anti-oppressive engagement. Her role with SOURCE aligns with this vision to grow opportunities for solidarity work with Baltimore communities and activate critical consciousness of justice praxis among health professionals.

Previously at Loyola University Maryland’s Center for Community, Service, and Justice and University of Maryland Baltimore School of Nursing’s Office of Global Health, Rosemary worked at the intersections of place-based justice, social determinants of health, gender, adolescent reproductive health, and HIV prevention education. She earned a Masters of Applied Anthropology from University of Maryland College Park and B.A. in Anthropology and Folklore minor from the Ohio State University. Outside of work, Rosemary hikes, runs, cooks, meditates, and loves to travel and plan adventures with her family.


sequean-headshotZ. Sequean Mahnke - Assistant Director


Z. Sequean Mahnke is assistant director of SOURCE working closely with JHU students and student leaders, and assisting them in developing community outreach skills, exploring and understanding social justice issues, planning key programs and events, and making connections with SOURCE’s network of partnering community-based organizations in Baltimore. Sequean brings his enthusiasm and optimism to SOURCE, where he wears many hats – including educator, coach, advisor, program manager and connector. He believes in empowering and uplifting others through the improvement of social functioning – all while having a good time. Sequean aims to equip our JHU students with the skills needed to be successful in their fields. He believes in the power of transformational relationships in which our students, faculty, staff, and community partners all learn and grow with and from one another through their shared experiences.  

Sequean comes to SOURCE from Morgan State University where he served as the Freshmen Orientation and Alumni Mentoring Program Coordinator. Sequean also served as adjunct faculty in the School of Social Work, College of Liberal Arts, and School of Computer, Mathematics, and Natural Sciences. Sequean is a Human Behavior Specialist with over 6 years of experience in higher education and human services in the Baltimore metropolitan area. He earned both his Bachelor of Science and Master of School Social Work at Morgan State University. 

ezzEzzat Shehadeh - Communications Specialist


Ezzat Shehadeh joined SOURCE in 2018 as our inaugural Communications and Events Specialist. In this role, Ezzat manages SOURCE's Weekly Service Scoop newsletter, social media accounts, website content, event advertising and e-mail marketing campaigns. 

Ezzat comes to SOURCE from George Mason University after serving as the Program and Communications Coordinator in the Center for Global Islamic Studies. Ezzat is a bi-lingual (Arabic and English) communications, marketing, programming and editing professional with over ten years of communication experience in media outlets and higher education. He earned his bachelor's degree in communication from George Mason University. 


er-headshotEryn Rich - Administrative Coordinator


Eryn Rich serves as the Administrative Coordinator for SOURCE. In this role, she assists with the administrative and organizational responsibilities of SOURCE. Eryn brings her positive attitude, humor, and energy to the team. She hopes to provide amazing support to the team at SOURCE and to the larger Johns Hopkins University community including students, faculty & staff, and partners.

Eryn earned a BA in Kinesiology from McDaniel College. She believes that there is significant value in building meaningful relationships and that community outreach serves as an advancement for both personal and professional growth. She is excited to learn more about the communities and opportunities that are assets within the Baltimore area. As an alumna of Baltimore SquashWise, a Community Based Organization and long-time JHU partner, Eryn looks forward to bringing her unique perspective to the job of connecting partners, CBOs and the JHU community.

glennGlenn Ross - Community Consultant


Glenn Ross serves as a Community Consultant to SOURCE. His primary functions with the center include: conducting tours of the East Baltimore community, speaking in a variety of academic settings, assisting with orientation activities for new students, and serving as a member of SOURCE’s Governing Board and Community Council. Glenn is active in a variety of local groups, and provides SOURCE with important updates and news from the surrounding communities. He has been a valuable member of our SOURCE team since the center was founded in 2005.