A citizen of a foreign country who wishes to enter the United States generally must first obtain a visa. Either a non-immigrant visa for temporary stay or an immigrant visa for permanent residence. The type of visa you must obtain is defined by immigration law and is related to the purpose of your trip. Visas are issued by US embassies and consulates.
The experience of the Law Firm of Valdez, Monarrez & San Miguel can help you and your employer go through the process, including determining the most appropriate type of Visa. Support them during the process and represent them in case the visa is denied and file an appeal.