That is the cicada killer wasp.  I have never known them to be truly aggressive to the point of stinging, but they will fly "in your face" to let you know that you are near their territory.  I have even excavated their nests without getting stung.

The adult females dig deep tunnels and then stock the den with one or two adult cicadas for their young to feed on.  They can be very numerous in the year after a large cicada emergence.

Thank you for this additional information. So, you wouldn't recommend any prevention/treatment methods for the cicada killer wasps? Also, do you know if these kind of wasp stings would have the same impact as a bee (I can also recommend that they reach out to their physician for this information)?

I have no good idea what an effective control would be, even if one was required.  Typically, these insects do no harm and their adult life span in only a few weeks long.

I have no references that indicate how serious a sting would be.  They can paralyze a cicada with their sting, so I would bet it hurts.  Venoms vary with species, so there is no way to know if a person that has bad reactions to a normal bee sting would also have a bad reaction to the sting of a cicada killer.

Would you be able to follow up with this stakeholder directly? They are questioning the identification - because the wasps around their home are very aggressive (even attacking other wasps and animals). Here is Thomas's contact information<personal data hidden>).

Thank you!

MG

Hello- I called yesterday and left a message.  Could I visit you today (Thursday) or Friday?  I have lost the note I took with your address, please call me on my cell phone so I can get it--  <personal data hidden>
Check out this information:

http://ncsupdicblog.blogspot.com/2015/08/are-asian-or-japanese-giant-hornets-in.html

Hey Erwin,

I am have been messaging you on behalf of Thomas. So, I would recommend calling him directly again. Here is Thomas's contact information<personal data hidden>).

Thank you!

Best,
Meaghan Gass

OK,.  was hoping to visit him today or Friday, but he has not responded to my phone message.

I'll probably be passing through your area this morning on other business.  I'll call Thomas again on my way there, maybe he can meet me today.  Did you save the specimens that he gave you?

Please respond to my cell phone for the rest of the day... I don't have access to email while on the road.   <personal data hidden>