He was the 11th prime minister of Luxembourg, serving for one year, from 24 February 1916 until 19 June 1917.

In 1916 the Loutsch Ministry, which had succeeded the Mongenast government, was forced to resign, having lost a confidence vote in the Chamber of Deputies.

A month later, Victor Thorn formed a new government, in which the three major parties were represented.

The government rationed foodstuffs, and put a cap on prices, which, however, resulted in a black market and led to tensions between the town and rural populations.

Finally the Chamber withdrew confidence in the agriculture minister Michel Welter, and the government fell with him.