personnel
The word "personnel" is a collective noun. While it refers to a group of people, it is almost always used with plural verbs (e.g., "personnel are" rather than "personnel is"). It is more formal than the word "staff." You will most commonly see it in official business documents, military contexts, or government announcements. When referring to the department that manages employees, it is often used as an uncountable noun (e.g., "contact personnel").
💬Casual Conversation
🎬Tuesday afternoon, Maya is at her desk while Ryan is gaming.
Maya
Did you ever sort out your payroll issue with personnel or are you just winging it?
Ryan
I'll get to it. No biggie.
💡
Maya is using 'personnel' to refer to the HR department. She uses the phrasal verb 'sort out' (to resolve) and the idiom 'winging it' (doing something without preparation), highlighting her organized nature versus Ryan's oblivious, laid-back attitude.