San Silvester was born in Mauponggo, Nagekeo Regency, Flores, on August 14, 1961.

He graduated from the SDK Maukeli, Seminary High St. John Berkmans Todabelu Mataloko Ngada (SMP-SMA), Philosophy of Catholic High School (STFK) Ledalero Maumere, and was ordained a priest of the archdiocese of Ende on July 29, 1988 by Msgr.

After becoming coach of the seminarians and teaching at Maumere Ritapiret STFK Ledalero from 1992 to 1995, he returned to university and earned his doctorate at Urbaniarum Biblical Theology in 1997 with a dissertation on "The Experience of the Risen Lord in Luke 24:1 -35".

In 1998 he returned to Indonesia and became a staff coach at the Ritapiret Seminary and a teacher at STFK Ledalero.

San Silvester was appointed Bishop of Denpasar by Pope Benedict XVI as published by the Holy See on November 22, 2008.