Originally Posted by
button push ignored
If you get a green card, it is a permanent residency card.
To maintain it you must remain a resident of the US.
You can not go to work in Asia or South America and keep your green card active.
You can be a resident of the US and work elsewhere. I file taxes as a resident, have a driver's license in the U.S, cars, house, wife and kids. I just happen to leave the country for a few weeks at a time for work.
No hassles at the border and no immigration judge would question where I reside.