Thank you!
corporate taxes?
Sorry, apparently I was assuming everyone could read my mind :-)
Lots of info there
personal tax issues i'd see a lawyer for: if you are in trouble with the IRS; estate planning
Tax attorneys (like myself) deal in tax philosophy and law, not so much numbers. I do returns for friends just to keep abreast of procedure, but it would not be economic to take on that kind of work generally: an accountant will have specialized software, be more efficient, and cheaper. (For example TurboTax has a professional edition; as do several other software suppliers. I don't do enough such work to justify buying it and paying them royalties on a per-return basis.)
A major international tax firm (Big 4, etc.) would also be a ridiculous expense unless your employer is paying. A lot of laid-off City types in London went berserk when they lost that perk.
Those who work in Switzerland and do not have tax equalization deals are bound to be double-taxed in several ways. There is not much you can do about that. Those married to Swiss and other non-Amcits have a serious estate planning problem since the usual rules for US-based mixed couples don't work abroad. (Forced heirship; QDOTs may be impossible, etc.)
Good luck.
Hope this helps!