This is a general subject I'm quite familiar with since I now work in Bangkok, Thailand, and it comes up all the time on expat forums. For a foreigner it is hard to do anything but teach English in Asia unless you have a very specialized skill set that's in demand due to both visa restrictions and unfavorable pay differences (that parallel cost of living differences).
That said, I'm working in IT and I know other expats doing different kinds of work. One of the more interesting differences is just seeing what's going on outside the US, which on a personal level relates to how Americans are regarded (long story, that part). I started out in quality work as a QA manager but have since moved on to data center operations, but still do work with a 27001 (security) system and 20000 (IT service management), and business continuity and "green" developments come up. Now I'm up against seeing how well it can transfer back to the US, mainly since I don't want my young son to grow up here.
That said, I'm working in IT and I know other expats doing different kinds of work. One of the more interesting differences is just seeing what's going on outside the US, which on a personal level relates to how Americans are regarded (long story, that part). I started out in quality work as a QA manager but have since moved on to data center operations, but still do work with a 27001 (security) system and 20000 (IT service management), and business continuity and "green" developments come up. Now I'm up against seeing how well it can transfer back to the US, mainly since I don't want my young son to grow up here.