She is a subject matter expert in nanomaterial-related toxicology and exposure. Her activities include working with partners, collaborators, and clients in designing & directing studies and training & advising facility staff. She possesses a working knowledge of laboratory science and U.S. regulatory climates. Routine activities include data collection, analyses, and interpretation as well as results documentation and reporting. Christie received her PhD in Chemistry in 2005 from Rice University. Her dissertation focused on the nano-bio interface. In 2005, she joined The DuPont Company as Visiting Scientist and aided in the drafting of the DuPont-Environmental Defense Nano Risk Framework.