Until 2014, she served as the senior director of environmental and clinical sciences for Autism Speaks.
[1] She also serves at an adjunct professor in the Pharmacology and Toxicology Department at Rutgers University.
After obtaining her bachelor's degree from the University of Texas at Austin, Halladay received her M.S.
(1998) and Ph.D. (2001) in psychology, both from Rutgers University, where she completed a postdoctoral fellowship in pharmacology and toxicology.
"[4] She has also said that early intervention "can make a real lifetime of difference"[5] with regard to improving symptoms of autism in children, and after a study on folic acid and autism was published in JAMA, Halladay said that taking folic acid during pregnancy was "a relatively inexpensive way that parents can take action to possibly prevent risk of tube birth defects and autism".