noun
security guard; loss prevention officer
Refers to a person employed to protect property, maintain safety, or prevent theft, such as in stores, buildings, or events. The term is straightforward and neutral.
デパートの保安員が万引きを捕まえた。
The department store's loss prevention officer caught a shoplifter.
イベント会場には多くの保安員が配置されていた。
Many security guards were stationed at the event venue.
守衛 is a more formal or traditional term for a guard, often at gates or entrances of facilities. 保安員 is a modern, occupational term.
Compound of 保安 (ほあん, 'security, safety') and 員 (いん, 'member, personnel'). The word is a straightforward modern occupational term.