You will still have green-card. If you do get stationed overseas working for the government, this may not be counted as out of country time.
If you are at least 18 years old and:
Are the spouse of a U.S. citizen who is one of the following:
- A member of the U.S. Armed Forces;
- An employee or an individual under contract to the U.S. Government;
- An employee of an American institution of research recognized by the Attorney General;
- An employee of an American-owned firm or corporation engaged in the development of foreign trade and commerce for the United States;
- An employee of a public international organization of which the United States is a member by law or treaty; or
- A person who performs ministerial or priestly functions for a religious denomination or an interdenominational organization with a valid presence in the United States
and You will be proceeding to join your spouse whose work abroad under orders of the qualifying employer will continue for at least 1 year after the date you will be naturalized. Form N-400 should be filed prior to departing.
Continuous Residence: Not Required
Physical Presence in the United States: Not Required
Time in USCIS District or State: Not Required