Dr. Marchack is a 1987 graduate of the University of the Pacific, School of Dentistry. He has received his prosthodontics certificate, in 1992, from the University of Southern California. Dr. Marchack belongs to numerous professional organizations including the Pacific Coast Society of Prosthodontists, the American College of Prosthodontists, the Academy of Osseointegration, the Academy of Prosthodontics, the San Gabriel Valley Dental Implant Study Club, and the Southern California Osseointegration Study Club. He has written numerous articles, in peer reviewed journals, relating to the restorative aspects of implant dentistry. Dr. Marchack is on editorial review board of the Journal of Prosthetic Dentistry and Quintessence International. He has lectured nationally and internationally. Dr. Marchack has been interviewed on local and national television news programs pertaining to dental procedures. Currently, he has a full time practice, in Pasadena, California; is the founder and current director of the San Gabriel Valley Dental Implant Study Club; the co-director of the University of Southern California’s Odontic Seminar; and is an Associate Clinical Professor, at the University of Southern California, in the department of Continuing Education.