King in Prussia
Brunings played an important role in the negotiations between Frederick the Great, King in Prussia, and the provinces of Holland and Gelderland on the distribution of water from the Rhine in the Waal, Lower Rhine and IJssel. After 22 years of negotiations a treaty was signed in 1771 on the Rhine water distribution, which meant a first step in international water management consulting business. He was also involved in improving the dikes along the Rhine to help prevent damaging floods.