Among his earliest works was a marble relief of the Canonization of St Ignatius (1695–1698) for the Church of the Gesù, based on a design by Andrea Pozzo, and a Monument to Count Vladislav Constantine Wasa (Stimmate di San Francesco, 1698–1700), commissioned by Cardinal Giovanni Francesco Albani (later pope Clement XI).
In around 1717, he participated in a team led by Camillo Rusconi, creating the memorial monument in St. Peter's basilica for Gregory XIII.
For the main altar, he made a relief commemorating the victory by the divine intervention of the House of Savoy over the forces of Louis XIV in the siege of Turin in 1706.
Cametti also completed statues of angels crowning the St. Francis Regis altar of the church of the Descalzas Reales in Madrid, which features a large relief by Rusconi.
His Monument to prince Taddeo Barberini in the church of Santa Rosalia in Palestrina in 1704 reflects a change in tomb sculptural designs, moving away from the emotive memento mori of high baroque towards more serene attention to eternal fame and glory.