Administrator (noun)

1. A person responsible for managing an organization or group of people.
2. A person in charge of the financial and business aspects of an organization.
3. A person who manages a computer system or network.

Origin:

Late middle english: from latin administrat- "managed", from the verb administrare, from ad- "to" + ministrare "serve".

Examples:

1. The company appointed a new administrator.
2. The administrator is responsible for managing the company's finances.
3. The network administrator is responsible for maintaining the company's computer system.
4. She was appointed as the administrator of the estate.
5. He acted as administrator of the school for a year.