If you read the requirements for recertification at www.nremt.org, you will see that you must be actively working where your ALS skills are being utilized - it doesn't specify where. Are you using your advanced skills while working outside of the US? If you satisfy the requirements, will your medical director sign off for you?
Be actively working within an emergency medical service, rescue service, or patient health care facility using your ALS skills.
Complete all requirements prior to March 31.
Complete the recertification report in its entirety and submit the completed report prior to March 31.
Demonstrate continued cognitive (knowledge) competency through continuing education or examination.
If you recert by exam, how many chances do you get. ONE
Exam Option
Certified EMS professionals may make one attempt to demonstrate continued cognitive competency by taking an examination (in lieu of documenting continuing education) within six months of their expiration date (October 1 through March 31).
As I mentioned, all of this can be found on their website.
Toni