He served in the militia defending the town of Quebec during the siege by the Americans in 1775-6.
He participated in the campaign at Lake Champlain, becoming lieutenant, and was taken prisoner in 1777 at the Battle of Saratoga.
De Bonne continued to serve in the militia after this time, becoming colonel in 1809.
He studied law at Montreal and qualified as a lawyer and notary in 1780.
De Bonne inherited the seigneury of Sault-Sainte-Marie from his father; he acquired additional properties over the years.
In 1781, he married Louise, daughter of Michel Chartier de Lotbinière; they separated by mutual consent in 1782.
As a judge, he supported the continued use of French civil law.
The Parti canadien on a number of occasions attempted to introduced legislation prohibiting judges from sitting in the legislature; this was in part aimed at de Bonne.
In 1809, Lieutenant-governor James Henry Craig dissolved parliament as a result.
In 1810, the assembly voted to declare his seat vacant.
Again, the governor dissolved parliament.
De Bonne retired as a judge in 1812.
In 1805, de Bonne had married again after his first wife died in 1802.
He died at his estate in Beauport in 1816 and apparently left his estate to a relative.
His second wife was unable to secure a pension from the government after de Bonne's death and committed suicide in a hospital for the insane in 1848.