Dr. Geron became a diplomate of the ABFO in 1982. He received his DMD degree in 1979 from UMDNJ in New Jersey, and then attended the UMDNJ/JCMC residency program; becoming a certified oral and maxillofacial surgeon in 1982 Dr. Geron was appointed Director of Forensic Medicine and Dentistry at the UMDNJ dental school. He has served as a consultant to the New Jersey State and county medical examiners offices, prosecutor's office, state police and the New Jersey Commissioner of Insurance. Dr.Geron was the first in the State of New Jersey to have bite mark evidence used in the Superior Court toward the conviction of murderer and rapist. The original case involved bite marks on human anatomy, and other bite marks in food substance, and both were considered landmark cases for the state. Dr. Geron presently practices out of Westfield, New Jersey.