Dr. Marchack graduated from USC School of Dentistry in 1971 and received his MBA from UCLA in 1989.
Dr Marchack is a Fellow of the American College of Dentists, a Fellow of the International College of Dentists, and a Fellow of the Pierre Fauchard Academy. He is past-president of the American Prosthodontic Society, past-president of the Pacific Coast Society for Prosthodontics, past-president of the American Academy of Esthetic Dentistry and past president of the Osseointegration Study Club of Southern California. He is a member of the Academy of Prosthodontics, the International College of Prosthodontists, the Academy of Osseointegration and the Newport Harbor Academy of Dentistry, and is one of the founding members of the Academy for Excellence in Dentistry in Los Angeles, CA.
Dr Marchack was recently inducted as an Honorary Member of the American College of Prosthodontists at its annual meeting in 2012. He serves on the Board of Councilors at the Ostrow School of Dentistry of USC, teaches several courses in restorative implant dentistry for the department of Continuing Education at USC, and is the course director for the USC-Hong Kong Comprehensive Surgical and Restorative Implant Training Program. Dr Marchack is currently the Chair of the Editorial Council for the Journal of Prosthetic Dentistry, and maintains a private practice with a focus on esthetic, restorative and implant dentistry in Pasadena, California.