He was the chief ingénieur des ponts et chaussées for the States of Burgundy (French: États de Bourgogne).
In 1706, the États de Bourgogne ("States of Burgundy") had decided to appoint a chief Ingénieur des ponts et chaussées (literally "Engineer of Bridges and [High]ways", more naturally in Modern English "Civil Engineer") for the province.
[Note 1] Since 1751, ideas had been floated by the États de Bourgogne to study the improvement of the ports and quays along the River Saône.
In 1770, superintendent Amelot asked the Mayor of Chalon, Claude Perrault, for a feasibility study with Gauthey and the town's tradesmen to ensure the project was workable.
Between 1772 and 1778, with Gauthey, he planned the enlargement and rebuilding of the electoral chamber oaround the cour de Flore ("Floral Court") of the Palace of the States of Dijon.
With Gauthey, Dumorey drew up plans for the Pont de Pierre ("Stone Bridge") over the Baulch stream on the road from Monéteau to Auxerre (both in the Yonne department in Burgundy).