Orry was named Controller-General of Finances in 1730 and combined this function with being director general of the Bâtiments du Roi ("the king's buildings") in 1736, after the death of the duc d'Antin.
Applying the principles of Colbert, he sought to develop the domestic manufacture of textiles and paper, and was involved in the production of porcelain in Vincennes in 1740.
As director general of Ponts et Chaussées (bridges and highways), Orry finished the Crozat canal and maintained and developed France's road system.
He sent to the intendants, in 1738, a detailed instruction on the duty (la corvée royale) for all inhabitants to spend a fortnight a year on the construction and maintenance of transport routes, classed in five categories.
"M. Orry", wrote the duc de Luynes in his Mémoires, "has always appeared to have no ambition, always regretting not being able to live on his estate, near Nogent, and always ready to go there with pleasure."