Does your ASVAB score go invalid if you enlist, or will those scores still be valid indefinitely?

Your ASVAB scores only go invalid at 5 years if you DO NOT enlist. If you enlist, those scores remain valid for the duration of your career, and are used for any course, MOS or commissioning course during your career. If you want to go to a course that you do not qualify for with your current scores, you can re-test.

ASVAB follows you through out your career. It helps to identify your ability to take on other jobs, based on education level.

Its valid if you enlist.