Better to transfer them to someplace like Nome, AK or some remote pacific island like Wake or Midway than anyplace in the lower 48! Tell them if they want to stay employed with FedGov they must accept transfer.
Their refusal to accept transfer of their job location will be considered a resignation and they will be dismissed from federal civil service!
Here is one possibility, a long way from anywhere. There used to be one USFWS biologist stationed there who got to work near the nerve gas bunkers. Don't know if there is anyone there anymore.
https://www.fws.gov/refuge/Johnston_Atoll/wildlife_and_habitat/index.html