I'm a UK Citizen living in the USA. What would the requirements be to move with my US Citizen spouse to Germany? And is it possible or would I have to move over first then move there.
According to this article:
Another article provides the details of the formalities for Non-EU spouses:
In the case of Germany, this article indicates:
Generally speaking, your spouse has a very strong right to move with you, as explained by David.
In practice, US citizens can visit Germany for three months without a visa and are allowed to apply for a residence permit from within the country anyway (i.e. even if they are not EU family members) so the procedure is very simple. Just move together and apply for a residence permit as soon as you have all the documents. Do check in advance with the local “Ausländerbehörde” to make sure you have everything and can get documents or translations in advance.
If your spouse had another citizenship, the procedure could be slightly more complex as it could still be necessary to secure a visa before moving but that's not the case for US citizens.