[1] He completed his internal medicine residency at the Albert Einstein-Bronx Municipal (Jacobi) Hospital Center and served as associate director of emergency services there from 1977 to 1979.
Between 1988 and 1996 he was an associate professor of clinical medicine at State University of New York, Brooklyn - Downstate Medical Center.
Flomenbaum is on the editorial boards of the American Journal of Emergency Medicine (AJEM), Poisindex, Emergindex and other medical publications.
[6] Flomenbaum is a senior examiner for the American Board of Emergency Medicine, and a consultant to the New York City Poison Control Center.
[1] A member of the Albert Einstein College of Medicine Alumni Association board of governors for many years, Flomenbaum served as its national president from 1997 to 1999.