He made contact with French government agent Thomas Pichon, who betrayed the Acadians by giving information to the British.

When Lieutenant-general Robert Monckton departed Beauséjour in November, Scott was left in command in the Chignecto area.

Scott was a commander of light troops and an officer of Major General Peregrine Hopson's 40th Regiment of Foot, and was familiar with irregular tactics.

He was to serve with distinction both during the Siege of Louisbourg (1758) and later with Major General James Wolfe at Battle of the Plains of Abraham.

A purported miniature of Scott is reproduced in Webster’s Thomas Pichon; it portrays a sharp and rather unpleasant face.