Enlistment into the Air Force by citizens of countries other than the United States is limited to foreign nationals who are legally residing in the United States and possess a valid Permanent Resident Card (USCIS Form I-551), commonly known as a “Green Card”. More than two years of eligibility remaining prior to expiration of one’s Green Card is required. Applicants must be between 17 and 39; meet the mental, moral and physical standards for enlistment; and must speak, read and write English fluently. All lawful permanent residents must also complete a background investigation and receive a favorable military security suitability determination (MSSD) prior to entry into service.
