Complex sentence: Claude Joseph Sauthier (1736--1802) was an illustrator, draftsman, surveyor, and mapmaker, who was employed by the British colonial government in the American colonies prior to and during the American Revolutionary War.
Split into simpler sentences: Claude Joseph Sauthier (1736--1802) was an illustrator, draftsman, surveyor, and mapmaker. He was employed by the British colonial government in the American colonies prior to and during the American Revolutionary War.