Prior to the Most Rev. Roberto O. Gaa, D.D., the Diocese of Novaliches had two former Bishops who shepherded its Faithful since its establishment.
The first Bishop of Novaliches is the Most Rev. Teodoro Bacani, Jr., D.D. who held his post for eleven months.
The second Bishop of Novaliches is the Most Rev. Antonio R. Tobias, D.D.He held his post for 16 years.