Supervisor (noun)

1. A person who oversees the work of others.
2. A person who is in charge of a particular department or area of a company or organization.
3. A person who is responsible for guiding and directing the work of others.
4. A person who is responsible for the supervision of a particular project or task.
5. A person who is responsible for the training and development of junior staff.

Origin:

From latin supervisus ("overseen"), from super- ("over") + visus ("seen"), the past participle of videre ("to se.e")

Examples:

1. He is the supervisor of the construction site.
2. She is the supervisor of the customer service department.
3. The supervisor is responsible for the performance of the team.
4. The supervisor will be your main point of contact for this project.
5. The supervisor is responsible for the training of new employees.