Dr. Ruppert is an Assistant Professor of Medicine at Columbia University Medical Center and a Distinguished Lecturer in Epidemiology and Community Medicine at New York Medical College.

She began her career in a faculty medicine practice for St. Joseph Regional Medical Center, in Paterson, New Jersey, then in a private internal medicine practice in Orange County, New York. Dr. Ruppert then joined Helen Hayes Rehabilitation Hospital as Medical Director of Employee Health Services.

In 2013, she was appointed as the Commissioner of Health and then additionally, the Commissioner of Hospitals of Rockland County, NY.

Dr. Ruppert received her Master of Public Health in Health Policy and Management from Columbia University and graduated with honors from the New York College of Osteopathic Medicine.