Can you work after naturalization?
Answer
Yes, you already have work authorization
Explanation
Yes, naturalized citizens can work in the United States immediately and without restrictions; in fact, they had work authorization before naturalization as lawful permanent residents and that authorization continues seamlessly after the oath ceremony. Lawful permanent residents have unrestricted work authorization in the United States under section 274A of the Immigration and Nationality Act (8 U.S.C. section 1324a) and can work for any employer, in any occupation, in any state. Naturalization does not disrupt this authorization; rather, it extends and expands it.
After naturalization, the new citizen also becomes eligible for federal employment that requires U.S. citizenship (a substantial portion of federal jobs, including most positions in the FBI, CIA, State Department, certain Department of Defense roles, the U.S. Postal Service for some positions, and many federal agencies in roles involving classified information or national security); for jobs at private employers that require U.S. citizenship under specific federal contracts or regulations (defense contractors handling classified information, certain transportation roles requiring TSA clearance, certain Department of Energy nuclear-related roles); and for state and local government jobs that statutorily require citizenship in the relevant state.
New citizens should update their employment records with their new status by completing Form I-9 (Employment Eligibility Verification) with the Certificate of Naturalization or U.S. passport as the document of choice; the previous Form I-9 with the green card information should be retained by the employer as required by law (employers do not generally need to re-verify employees who have current employment authorization, but employees may voluntarily update their I-9 to reflect citizenship). New citizens may also wish to update their Social Security Administration records to reflect citizen status (Form SS-5 at the local Social Security office, presenting the Certificate of Naturalization), which can affect eligibility for certain benefits, federal employment background checks, and tax filing categories.
Most private employers do not differentiate between permanent residents and citizens for ordinary employment, but federal employment, security clearances, and certain regulated industries do, and citizenship opens doors that were previously closed.
Why this matters for your test
Understanding that work authorization is uninterrupted by naturalization (and indeed expanded to include citizenship-restricted positions) reassures applicants that the legal status change does not disrupt employment. The new citizenship opens additional federal, state, and security-cleared opportunities that were not previously available.
Source: USCIS Application Guide (2025)
