Need Accountant who understands US tax laws. (Nuremberg)

We recently sold a rental property in the US and need an accountant who understands both German and US tax laws.

Our US accountant can't advise us on how this sale will impact our German taxes and our German accountant does't know anything about filing in the US.

We need someone who can help us. I am an American. Husband is German.

Any suggestions or contacts would be great!

We are in the Nürnberg area but would be willing to talk with people outside the area.

Thanks.