He held the post of Capomastro delle Opere della Religione and was the principal architect of the Order of St. John from 1761 until his death.
Bonici began drawing architectural plans at a young age, and he was apprenticed to the Maltese architect Giovanni Barbara and later the French military engineer René Jacob de Tigné.
He made plans for the St. Publius Parish Church in Floriana in 1734, which solidified his fame as a master of religious architecture.
[4] Bonici held a number of positions throughout his career, including a substitute engineer at the Commissari Domorum, an examiner of those aspiring to be land surveyors, and Capomastro delle Fortificazioni della Fondazione Cotoner.
Most notably, he held the post of Capomastro delle Opere della Religione, being the principal architect of the Order of St. John, from 1761 to his death in 1779.