I know nothing about them, but if you look at their career page, it says they aren't hiring. I've heard http://www.stewartlaw.com
is very very good. I've also heard of http://www.strtrade.com/
, but can't speak to their quality. From what I hear though, after the failure at Doha, several years of unfriendly U.S. administrations for supporting these kind of claims, and the absurd cost of litigating them, the international trade law field is dying a death similar to communications law and class action securities.