Robbyn Lewis holds a Bachelor of Arts in anthropology from the University of Chicago and a Master of Public Health in international health from Columbia University. With a career spanning over three decades, Lewis has accumulated extensive experience in public health, international development, and program management. She has held roles such as a Research Coordinator at Johns Hopkins University School of Public Health and a Senior Program Officer at Family Health International. Lewis has also been involved in various capacities with organizations such as UNICEF, the World Bank, and Jhpiego. Her leadership roles include serving as Chair of the Land Use and Ethics Subcommittee of the Environment and Transportation Committee and involvement in multiple commissions and caucuses focused on sustainability, mental health, and transportation.

Robbyn Lewis's political identity is marked by an intricate blend of environmental advocacy and economic pragmatism, often surprising critics with her ability to align with opposing factions on environmental regulations. Her background in public health and international development informs a deeply localized approach to policymaking, emphasizing community-specific solutions. Lewis's commitment to sustainable growth and equitable job creation, coupled with her unique stance as the only car-free lawmaker in Maryland, reveals a strategic focus on reducing personal carbon footprints while advocating for broader systemic changes.