In his professional career Dr. Tahmasebi has done research and development work on laser whitening as the Medical Director of BriteSmile Company, introducing laser whitening globally. Subsequently, serving as C.E.O of Glamsmile in the U.S., U.K. and Canada, he then became the Vice President of Education as well as Research and Development at DenMat where he invented and brought many products to market including FirstFit Technologies. He continued the research and development of FirstFit at Viax Dental Technologies where he served as President and C.S.O. Today, Dr. Tahmasebi manages the FirstFit Technology for Global Distribution. In the course of his work at these companies he has introduced many products to dentistry, including a Diode laser, lesion detection light, the One Hour Veneer system, and most recently the invention of First Fit Minimally Invasive Technologies. He has appeared as a dental expert on CNN, CBS, ABC and other TV networks. He is recently featured on the cover of Inside Dentistry magazine. Dr. Tahmasebi also lectures globally on cosmetic dentistry as well as minimally invasive techniques.