Dr. Greiner graduated with a bachelors of science degree from Clemson University in 1976. He received his DMD degree from the Medical University of South Carolina in 1980. In 1981, Dr. Greiner opened the practice now known as York Dental Group. In addition to practicing dentistry, Dr. Greiner has served the community as president of the York Rotary Club, president of the York Greater Chamber and chairman of the Council of Chambers. He is a member of Abiding Presence Lutheran Church. He and his wife Paula live in York.