Julian Sheppard Heyman III, 52, of Springfield, was arrested Nov. 30 by Effingham County sheriffs deputies at his residence and charged with numerous counts related to molesting an underage girl.
Wednesdays charges include four more counts associated with a second underage female, said sheriffs spokesman David Ehsanipoor.
Heyman is currently employed as a sixth-grade science teacher at Ebenezer Middle School in Rincon. At the time of the alleged incidents, he was employed with the Savannah Diocese.
"At this point in the investigation, there is no indication these incidents took place at the school or against any of his students," Ehsanipoor said.
Heyman remains in the Effingham County jail without bond.