If Korean companies are anything similar to Japanese companies (which I'm guessing they are to an extent),then you should also realise the graduate pay there is lower, and there a much more hierarchical system, where you work x amount of years and you might get promoted less then you do really well and get promoted.(it still happens, but you gotta push a lot harder). So note these differences too when considering. Also I've done extensive research on working in Japan, like Ozko said your best bet is really going to work in a international company which has a significant presence there and would allow you to transfer, that's your best means of lending a decent job there without having to work as an English teacher(which has no prospects). Generally speaking English is more of a bonus rather then a deciding factor for the job, you'll be competing with people who have much better marks then you and local work experience. There's also others like you which you need to compete with particularly from America, you won't be the only foreigner looking for a job.
Really pull up your weight if you're considering this,otherwise work here and get lucky transferring.
