Can I create a dynamic field that pulls from already-existing sdp fields?

Can I create a dynamic field that pulls from already-existing sdp fields?

I often have regional presidents requesting services on behalf of their sites, so when they submit a ticket, the site of the request may be (Corporate Office), but I'd like for them to specify which site they are requesting service for one of the sites under them.

I'd like them to be able to populate a field pulled from the "Sites" table.

Is that possible?

Thanks,
Adam