Dr. Marcus is a Professor of Epidemiology in the Rollins School of Public Health. She also holds faculty appointments in the Department of Environmental Health and the Department of Pediatrics in the School of Medicine. She received her MPH and PhD from Columbia University and completed a fellowship in Neuro-epidemiology. She held a faculty appointment at Mt Sinai School of Medicine for seven years and was Director of the Environmental Epidemiology Core of the NIH-funded Environmental Health Sciences Center.

Dr. Marcus joined the faculty at Emory University and has held numerous leadership positions at Emory including Interim Department Chair, Director of Graduate Studies and developed the Molecules to Mankind interdisciplinary PhD program. Dr. Marcus has served on advisory committees for the National Academy of Sciences, the Centers for Disease Control and Prevention, the National Institutes of Health and Kaiser Permanente. She also received an award for Outstanding Scientific Contributions from the Department of Health and Human Services.

Dr. Marcus has over 20 years of experience conducting large collaborative studies with physicians and scientists from many fields and over 100 peer-reviewed publications. Her research has been continuously funded by the National Institutes of Health for the past 25 years. She enjoys teaching and has mentored scores of graduate students and Post Doctoral Fellows during her career.