overseer
noun /ˈəʊvəsɪə(r)/
/ˈəʊvərsɪr/
- (old-fashioned) a person whose job is to make sure that other workers do their work
- a person or an organization that is responsible for making sure that a system is working as it should
Word Originlate Middle English (also denoting a person appointed to assist the executor of a will): from oversee.