I live in Canada also, but work in the states (I'm a dual). When I applied for work in the US, I stated early on in the cover letter my status(legal to work in the US and have a US ATP). Also, suggested the best way to get me was thru e-mail. Never was a problem. Overseas may have a problem because the employer thinks you are going to try and commute from there(?). Commuting from Canada shouldn't be that difficult, or let them know if you are willing/planning to move to the States. Good luck!