Jo Wiederhorn
President and Chief Executive Officer

Jo Wiederhorn has been the President and CEO of the Associated Medical Schools of New York (AMSNY) since 2002. Under her tenure the organization has focused its efforts on educating the public on the role medical schools have played in attracting and retaining an inclusive and diversified physician workforce. This has been accomplished through the development of pipeline programs across the medical education continuum. The organization has also focused its efforts on informing the public about the important role biomedical and life sciences’ research has on improving the health outcomes of NYS’ residents. Prior to her work at AMSNY she was the Chief of Staff to the Dean at NYU School of Medicine and Director of its Institute for Urban and Global Health. Prior to her tenure at NYU, Ms. Wiederhorn was the Chief of Staff to the President of the then Health and Hospitals Corporation and Associate Executive Director of MetroPlus Health Plan.

Jonathan Teyan, MPA
Chief Operating Officer

Jonathan Teyan joined AMSNY in 2011 and currently serves as Chief Operating Officer. In this role, he is responsible for a portfolio of initiatives in biomedical research, medical education, global health and government affairs. Jonathan began a peripatetic career in science studying conservation biology at Cornell University, then at the National Audubon Society, where he directed that organization’s largest environmental education center. After a five-year stint at Audubon, he completed an MPA in Management at Columbia University’s School of International and Public Affairs, where began a longstanding interest in public health policy. Jonathan then joined AMDec Foundation, where he worked with genomic scientists, diabetes researchers and spearheaded the development of a $20M shared-use transgenic mouse breeding facility. Jonathan has also worked as a science writer and consulted for biomedical startups.


 Jennifer Tassler
Director of Policy and Programming

Jennifer Tassler joined AMSNY in 2016 and is currently the Director of Policy and Programming. In this role, Jennifer oversees AMSNY’s government relations and diversity efforts. She monitors all state and federal legislation affecting AMSNY member schools and manages AMSNY’s Diversity in Medicine Programs, including the Diversity in Medicine Scholarship Program. Jennifer also works with staff to plan advocacy day activities in Albany and Washington, DC, and works with external lobbyists and is the liaison to the Government Relations Committee at AMSNY. Prior to joining AMSNY, Jennifer worked in the Office of Legislation at the Food and Drug Administration and spent several years at the American Psychiatric Association where she handled federal regulatory policy and congressional relations. Jennifer has a longstanding interest in science and medicine, graduating with a major in neuroscience from Pomona College in Claremont, CA, and then went on to law school at The Catholic University Columbus School of Law in Washington, DC, where she specialized in health law.


Brateil Badal, MS, PhD
Director of Diversity

Brateil Badal joined AMSNY in 2017 as the Director of Diversity. Her role is to manage AMSNY’s diversity in medicine and science academic pipeline programs and scholarship and to develop new diversity initiatives. She serves as a liaison to AMSNY’s Committee on Diversity and Multicultural Affairs (CDMA) and works closely with each of the medical school diversity program directors. Brateil’s expertise lies in science education and STEM diversity program development. She has 10+ years of experience in science diversity programs and academic support services in higher education, spanning six institutions and organizations nationwide. As an undergraduate, she experienced first-hand the critical impact a diversity program can have on a student’s academic, career, and life success. Brateil graduated from the University of California, Berkeley with a major in Molecular and Cell Biology and a minor in Education, and a master’s degree in Endocrinology. Dr. Badal comes to AMSNY from the Graduate School of Biomedical Sciences at Icahn School of Medicine at Mount Sinai, from which she earned her PhD in Biomedical Sciences in May of 2017. Her doctoral work focused on gene expression profiling of human primary melanoma. She has taught numerous biology courses to undergraduate, graduate, and medical students at UC Berkeley, CUNY School of Medicine/The Sophie Davis Biomedical Education Program, and Icahn School of Medicine at Mount Sinai, and currently teaches as an affiliate assistant medical professor at CUNY School of Medicine.


Kallie Fellows
Anatomical Program Manager
Administrative Coordinator

Kallie is a graduate of Mount Holyoke College, where she earned a Bachelor of Arts having majored in Biochemistry and minored in Studio Art. During college, she worked with the Medical Emergency Response Team on campus to advocate for more accessible EMT training, and worked with Professor Craig Woodard to research unisexual reproduction in Ambystoma salamanders. Since graduation, she has volunteered at RVNA Health Hospice Care to provide comfort and socialization to hospice patients, and is in the process of applying to medical schools. At AMSNY, Kallie manages the anatomical gift program and administrative functions.