T. Joshua Pfefer received his PhD in biomedical engineering from the University of Texas at Austin and trained as a research fellow at the Wellman Laboratories of Photomedicine. In 2000, he joined the FDA, where he is the leader of the Optical Diagnostic Devices Laboratory. His research focuses on elucidating light-tissue interactions of emerging technologies and developing new methods to improve and standardize testing. In 2018, he was named a fellow of SPIE for contributions to biophotonics.