[2] For nearly twenty years regimental duty and scientific work occupied him, and in 1752 he became captain of a company of miners.

[6][7] At Schweidnitz, his 1748 design of fortification gun was tested and significantly improved by Master Carpenter Richter.

[8] In 1762, he reported back to the Paris authorities on the Austrian artillery system compared with the existing French de Vallière guns.

[11][12] On his return to France he was made maréchal de camp (major general), in 1764 Inspector of artillery, and in 1765 lieutenant général and commander of the Order of Saint Louis.

However, he became first inspector of artillery in 1776, in which year also he received the grand cross of the St Louis Order.