Screener (noun)

1. A person or machine that screens or filters something, such as a screening test for a particular disease.
2. A person who checks for security or other restrictions, such as airport security personnel or a person who checks movie tickets.

Origin:

The word 'screener' comes from the verb 'screen' which means to filter or examine something to remove or detect unwanted elements.

Examples:

1. She was hired as a screener to check passengers before they boarded the flight.
2. The screener found a knife in the traveler's luggage and notified the authorities.
3. The company required all employees to undergo a health screener before returning to work.
4. The movie theater hired screeners to check tickets and make sure no one sneaks in.
5. The screener at the medical clinic performed a series of tests to determine the patient's health status.