Visa Services: An alien can also enter the United States without a visa under the Visa Waiver Program (VWP). This program was designed to allow nationals from certain countries to enter as visitors for a limited period of time without a visa. Not all countries qualify for this program. Only a few countries that meet certain criteria, the most important of which is a past history of low refusal rates for visas, qualify for this program. Under this program, a non immigrant visitor may enter the United States from a visa waiver country for a period of 90 days or less. But, there are several disadvantages to applying under this category. The alien cannot apply for extension beyond the 90-day period, nor can the alien change his or her status in the United States.

You will require the help of a good visa attorney in the United States to help you procure a visa to that country. Some of the good visa attorneys of Washington D.C. whose help you can seek are James D. Alexander Attorney, Ian Band Attorney, and Neal A. Barkus Attorney.

Immigration Services: The Employment-Based 1st Preference, also known as the priority worker category, is divided into three groups. Preference category EB1 (1) is for aliens with extraordinary ability. In this category, come individuals who have attained a level of expertise indicating that the person has risen to the very top in his or her field of endeavor. The petition filed by such an alien must be accompanied by proof that the alien has achieved national or international acclaim and that his or her achievements have been recognized in the field of expertise. The aliens applying under this category do not need to furnish proof of an offer of employment or a labor certification. However, the petition must be accompanied by clear evidence that the alien is coming to the country to continue work in the area of expertise.

You will require the help of a good immigration attorney in the United States who will guide you through the various immigration procedures and formalities. Some of the good immigration attorneys of Washington D.C. are Williams Mullen, David Lu's Law Offices, and Falls Church Immigration Clinic.