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Practice Areas

At William Y. Sim, P.C., we are a full-service immigration and nationality law firm. Our expertise include but are not limited to the below areas. Many of these services can be accomplished here in the United States (change of status or adjustment of status) or abroad (consular processing).

  • NON-IMMIGRANTS: Persons coming to the United States for temporary purposes.
    • B-1: Visitors for business.
    • B-2: Visitors for pleasure.
    • E-1: Treaty traders coming to the U.S. to carry on substantial trade from a treaty country.
    • E-2: Treaty investors coming to the U.S. to develop and direct substantial investment from a treaty country.
    • E-3: Professionals in specialty occupations from Australia.
    • H-1B: Professionals in specialty occupations.
    • H-1B1: Professionals in specialty occupations from Chile or Singapore.
    • K-1: Fiance(e) of U.S. citizens.
    • K-2: Spouses of U.S. citizens with pending immigrant petitions.
    • L-1A: Intra-company transferees who are in a managerial or executive position.
    • L-1B: Intra-company transferees who have specialized knowledge.
    • O: Persons of extraordinary abilities.
    • R: Religious vocation or profession.
    • T: Victims of human trafficking.
    • TN: Trade NAFTA (North American Free Trade Agreement) professionals from Canada and Mexico.
    • U: Victims of criminal activity.
    • V: Beneficiaries of immigrant petitions filed on or before December 21, 2000 that have been pending for three or more years.
  • IMMIGRANTS: Persons coming to the United States for permanent residence (green cards).
    • Family Based
      • IR (Immediate Relatives): Spouses, children (under age 21), and parents of U.S. citizens.
      • FB-1 (First Preference): Unmarried sons and daughters (over age 21) of U.S. citizens.
      • FB-2 (Second Preference): Spouses and unmarried children (under age 21) of lawful permanent residents or unmarried sons and daughters (over age 21) of lawful permanent residents.
      • FB-3 (Third Preference): Married sons and daughter of U.S. citizens.
      • FB-4 (Fourth Preference): Brothers and sisters of U.S. citizens.
      • VAWA (Violence Against Women Act): Spouse (men included), children, and parents who have been battered or subject to extreme cruelty by U.S. citizens.
      • EB-1 (First Preference): Outstanding professors and researchers, persons of extraordinary abilities, and multinational executives and managers.
      • EB-2 (Second Preference): Members of professions holding advanced degrees, persons of exceptional ability, and national interest waivers (NIW).
      • EB-3 (Third Preference): Professionals, skilled workers, and other workers.
      • EB-4 (Fourth Preference): Special immigrants, ministers, and religious vocation.
      • EB-5 (Fifth Preference): Employment creation investors. Labor certification.
      • Persons who have a well-founded fear of persecution based on race, religion, nationality, political opinions or membership in a social group.
      • Diversity Visa (DV): Visa Lottery for those from low admission countries.
  • CITIZENSHIP: Persons becoming a U.S. Citizen
    • Naturalization
    • Preservation of Residency: Employees of the U.S. government, U.S. research institute & U.S. companies.
    • Permanent resident spouses of U.S. Citizens working abroad for U.S. companies.
    • Adoptions.
    • Medical disability waivers.
    • Bond Hearings.
    • Deportation & Removal Proceedings.
    • Deferred Action.
    • Deferred Action for Childhood Arrivals.
    • Appeals.
    • Writ of Mandamus.

William Y. Sim, P.C. represents clients in all immigration and nationality law matters, including family-based immigration, employment-based immigration, removal, hearings, bond hearings, and asylum, as well as citizenship proceedings. We have extensive experience in all matters arising under U.S. immigration and nationality laws. William Y. Sim, P.C. is not only an expert in U.S immigration law, we understand how the immigration legal process works and we are committed to providing the highest quality representation in the areas of immigration and nationality law in an efficient, caring and professional manner.


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