Board Thread:Suggestions forum/@comment-88.117.41.142-20151221171736/@comment-27723099-20151222231213

I did some more research. It seems to be a controversial topic.

The plural of staff (stick) is either staffs or staves. The singular of staves is either stave or staff. So both forms are valid.

While most sources say staff (personnel) is already plural, there are some sources that go against it, for example:

"For staff (/stæf/ or /stɑːf/) in the sense of "a body of employees", the plural is always staff; otherwise, both staffs and staves (/steɪvz/) are acceptable, except in compounds, such as flagstaffs. Staves is rare in North America except in the sense of "magic rod", or the musical notation tool; stave of a barrel or cask is a back-formation from staves, which is its plural. (See the Plural to singular by back-formation section below.)"

- Wikipedia

Like some other nouns referring to multiple things, staff can also exist both in singular and plural. The plural staffs would mean "the staff of multiple organisations".