Generally, a citizen of a foreign country who wishes to enter the United States must first obtain a visa—either a nonimmigrant visa for temporary stay or an immigrant visa for permanent residence. Temporary worker visas are for persons who want to enter the United States for employment lasting a fixed period of time and are not considered permanent or indefinite. Each of these visas requires the prospective employer to first file a petition with U.S. Citizenship and Immigration Services (USCIS). An approved petition is required to apply for a work visa.

A common way to work temporarily in the United States as a nonimmigrant is for a prospective employer to file a petition with USCIS on behalf of the worker. If a worker has the right combination of skills, education, and work experience, they may be able to live and work permanently in the United States by seeking an employment-based immigrant visa.

If a worker lives outside the United States and wants to work in the United States, they generally must apply for a visa from the U.S. Department of State (DOS)—unless a visa is not required for persons from their country.

In many cases, USCIS must approve a worker’s petition before they are eligible to apply to DOS for a visa or seek admission at a port of entry. Before entering the United States, a worker must appear before a U.S. Customs and Border Protection (CBP) officer and receive permission to enter the United States and engage in the proposed activity.

If a worker is in the United States in a lawful nonimmigrant status that does not provide employment authorization, they generally may apply for:

• A change of status to a nonimmigrant classification that provides employment authorization; or

• An adjustment of status to become a lawful permanent resident. This may be a concurrent filing with an immigrant visa petition or, depending on the circumstances, may require an applicant to obtain an approved immigrant visa before applying for an adjustment of status to become a lawful permanent resident.

Depending on the classification a worker seeks, their change or adjustment of status application might require a U.S. employer or other qualified requestor to file an application or petition on their behalf to establish their eligibility before USCIS approves their application. But if the worker applies based on certain classifications—for example, an alien with extraordinary ability or as a nonimmigrant E-1 or E-2 principal treaty trader or investor—the worker may be eligible to self-petition, which means filing an application on the worker’s own behalf.

And if a worker is in the United States—including as an applicant for permanent residence or a certain family member of an alien who has lawful nonimmigrant status—the worker may file Form I-765, Application for Employment Authorization to request employment authorization and an Employment Authorization Document (EAD). A worker may also apply for an EAD that shows such authorization if their immigration status authorizes them to work in the United States without restrictions.

The conditions a worker must meet and how long they can work in the United States depend on the type of immigration status the Department of Homeland Security (DHS) grants. A worker must comply with all conditions of their employment authorization and the terms of their admission to the United States. If the worker violates any of the conditions, they could be removed from or denied re-entry into the United States.

In Texas, as in all states, the process for a foreign national to work temporarily or permanently is governed by federal law. Nonimmigrant visas are for individuals seeking temporary employment in the U.S. and require the prospective employer to file a petition with U.S. Citizenship and Immigration Services (USCIS). For permanent residence, an employment-based immigrant visa is necessary, which also typically involves an employer petition. Before applying for a visa through the U.S. Department of State (DOS), USCIS must usually approve the worker's petition. Upon arrival, U.S. Customs and Border Protection (CBP) officers will determine the worker's eligibility to enter. Those already in the U.S. on a nonimmigrant visa without work authorization may apply for a change of status to a visa classification that allows work or for an adjustment of status to become a lawful permanent resident. Some workers may self-petition for certain classifications, while others may need to file Form I-765 to request an Employment Authorization Document (EAD). Compliance with all employment authorization conditions and terms of admission is mandatory to avoid removal or denial of re-entry into the United States.