Dr. Greenspan is currently Vice President, Chief Technology Officer for US Biomaterials Corporation, a biomaterials development company specializing in bioactive ceramic materials for medical device applications. His work has focused primarily on the development of new bioceramic and composite materials for bone, cartilage and soft tissue repair and regeneration. Dr. Greenspan holds a Bachelors of Science degree in ceramic engineering from Alfred University, and a Ph.D. in materials science from the University of Florida. He has spent over 25 years in research and development of biomaterials.

Dr. Greenspan holds 21 patents in the area of bioactive glass and composites technology related to biomedical applications, and has co-authored 41 publications in the field. In addition to his corporate responsibilities he also holds adjunct faculty positions in the Department of Materials Science at the University of Florida and in the Department of Biomedical Materials Engineering and Science at Alfred University. He serves on the Advisory Board of the Interdisciplinary Center for Biotechnology Research at the University of Florida, as well as the Department of Biomedical Engineering and Science at Alfred University.