We might not hear much on that until tomorrow, since most iDTech development was out of the Frankfurt studio. If they're shutting down Frankfurt, it'd be worth getting antennae out.
Looking at LinkedIn, I see mostly people from tech (design tooling, game AI, QA), art (modeling, mats, UI, character), design (levels, gameplay), and production roles in DFW being cut, but haven't seen engine roles or Frankfurt-based employees.
ZeniMax's QA team was notably unionized in 2023: https://cwa-union.org/news/releases/quality-assurance-worker...