Our Staff And Leadership

Dedicated To Care, Grounded In Dignity

At Street Med STL, we serve as the safety net for the safety net. Delivering compassionate, outreach medical care directly to unhoused individuals across St. Louis. By meeting people where they are, in their reality, we practice radical acceptance and put relationships at the absolute center of our work. Behind every visit, prescription and check-in is a passionate team committed to affirming the dignity of our neighbors, advocating for their voices and educating our community. Meet some of the key team members driving this mission forward below.

About the Founder & Executive Director

Nathanial S. Nolan, MD, MPH, MPHE

Nathanial Nolan is an Infectious Disease physician at the St. Louis VA and Washington University, in St. Louis. He is the founder of Street Med STL. He completed his MD and MPH at the University of Missouri, where he also stayed to do his medical residency. He came to the Washington University in 2019 for his Infectious Disease and Medical Education fellowship. His clinical interests include caring for marginalized communities, including those living with HIV, those with substance use disorders, and those who are unhoused.

About the program director

Lesley Weinstein

Lesley Weinstein is the Program Director for Street Medicine STL. She has a background in social work, primarily serving unhoused individuals with co-occurring mental health and substance use disorders. She is also a harm reduction consultant with UMSL’s Missouri Institute of Mental Health and facilitates a statewide mail-order naloxone program with NEXT Distro. In prior roles, Lesley’s work has focused on overdose prevention, harm reduction, and expanding access to low-barrier, compassionate care for people who use drugs and other underserved communities.

About the medical director

cathy hermann, md

Cathy Hermann is an internal medicine physician, currently working at WashU School of Medicine. She did her training at Washington University School of Medicine and an internal medicine residency at Yale-New Haven Hospital. Her current focus is on primary care and resident education. She joined StreetmedStl in 2023 and currently serves as its Medical Director.

About the Harm Reduction Nurse

Margo Chesler RN, BSN (they/she)

Margoe Chesler, RN, BSN (they/she), is a community health and harm reduction nurse with Street Medicine STL. A nurse since 2017, they transitioned from hospital-based care to community health and harm reduction in 2022 after years of volunteering with St. Louis’s unhoused community.

Margoe’s work focuses on wound care, overdose prevention, and helping people navigate the healthcare system. They value the relationships built through wound care and the opportunity to provide a medical experience where patients feel heard and have a say in their care. Margoe believes a patient’s “no” matters and that everyone should be welcome to come back exactly as they are.

Our Three Part Mission:

SERVICE – to provide care to the unhoused of st. Louis
EDUCATION – to educate others about the unique health needs of this population
ADVOCACY – to lend our voice to those we serve