Employment based immigrant visas are divided into five preference categories. Certain spouses and children may accompany or follow-to-join employment-based immigrants. You can learn more about these five categories of employment-based immigrant visas on travel.state.gov.
To apply for an employment-based immigrant visa, follow the steps on the Immigrant Visa Process on travel.state.gov. Once you have completed those steps, review the instructions given to you by the National Visa Center (NVC), along with the information presented on this website, for further guidance and instructions.