Complex sentence: Simpson was born in Blackwell, Carlisle and began his career in 1778 as a millwright until being appointed an inspector and engineer of the Chelsea Waterworks he later also became an engineer at Lambeth Waterworks Company.
Split into simpler sentences: Simpson was born in Blackwell, Carlisle and began his career in 1778 as a millwright until being appointed an inspector and engineer of the Chelsea Waterworks. He later also became an engineer at Lambeth Waterworks Company.