Having reached the rank of captain in the 102nd line regiment, he left the army for health reasons.
In 1797, with his brother Joseph François Michaud and N. Giguet (died in 1810), he founded a (at first clandestine) printing press, specializing in books about religion and the monarchy.
He obtained his first commission from abbot Jacques Delille, then a refugee in London, who entrusted him with his books to be printed.
He described their ranks, their jobs, their talents, their writings, their troubles, their virtues, or their crimes in 4 volumes.
Michaud played a significant role in the return of Louis XVIII and expected a sinecure, but he was only rewarded with the Legion of Honour.