After studying medicine at Hannover Medical School, Sina Neyazi completed her doctoral research at the University of Halle, focusing on pediatric leukemia supported by a fellowship from the German Cancer Aid. In 2020, she began her clinical training in the Department of Pediatric Hematology and Oncology at the University Medical Center Hamburg-Eppendorf. At the same time, she conducted research at the Research Institute Children's Cancer Center Hamburg, where she investigated the development and classification of pediatric brain tumors with the support of a Clinician Scientist fellowship from the University Cancer Center Hamburg.

In 2022, she moved to the United States for a three-year postdoctoral fellowship at the Dana-Farber Cancer Institute and Boston Children’s Hospital, Harvard Medical School, with funding through the Walter Benjamin Program of the German Research Foundation. During this time, Sina Neyazi investigated pediatric high-grade gliomas using innovative high-resolution molecular approaches and identified important changes in cancer cell signaling pathways and metabolism. Her work contributed to the development of a targeted therapy for patients with specific genetic alterations in their tumor cells, which is already being applied in clinical trials.

Since returning in 2025, Sina Neyazi has continued her clinical work in pediatric oncology and, since 2026, has been establishing her own research group at the Research Institute Children's Cancer Center Hamburg.