スタッフ

The word staff is uncountable. We need to use the word member to count staff.

Examples:

• A member of staff ＝　１名のスタッフ
• Two members of staff　＝　２名のスタッフ
• Nine members of staff　＝　９名のスタッフ

There is another pattern with the same meaning:

• A staff member ＝　１名のスタッフ
• Two staff members ＝　２名のスタッフ
• Nine staff members ＝　９名のスタッフ

This is wrong:

• A staff X
• Two staffs X
• Nine staffs X

Similar words:

• employee (countable)
• worker (countable)