Law Offices of Ambassador Jose Mariano Castillo


International Business & Investment Counseling

The Law Offices of Jose Mariano Castillo offers counseling to foreign clients regarding the various ways to conduct business in the United States.. It offers its services:

  • To the business entities in Chile who contact the Office of Pro Chile in Los Angeles, California.
  • To the business persons in Spain who contact the Embassy of Spain Trade Representative in Los Angeles, California.
  • To those businesses or persons from Argentina who contact the Business Promotion Center at the Consulate of Argentina in Los Angeles, California.
  • To businesses or persons in the United States, as well as those from other countries, who contact The Law Office directly.

Probate and Estate Planning

The Law Offices of Jose Mariano Castillo has been representing clients for over 30 years in the preparation and drafting of Wills and Testaments, Trusts and other instruments of Estate Planning. Mr. Castillo and his staff handle Probate and Conservatorship matters in the California Courts.

Family Law

The Law Offices of Jose Mariano Castillo handles family law matters in California consisting of dissolutions of marriage, annulment of marriage, adoptions and the drafting and preparation of pre and post nuptial agreements.

Corporations and Partnerships

The Law Offices of Jose Mariano Castillo handles the organization, creation and maintenance of corporations and partnerships in California. It does this specially for clients who are outside of the United States.


For over 30 years The Law Offices of Jose Mariano Castillo has been providing his clients with representation in all areas of immigration law, with a heavy emphasis on workers visas and immigration on the basis of bona fide marriage to US Citizens.

Private & Government International Law

Jose Mariano Castillo offers legal services to foreign nationals from Latin America and Spain in Southern California in all matters relating to business transactions, probate and estate planning, as well as family law and immigration matters.

Representation of foreign governments in the U.S.

Jose Mariano Castillo has been the legal counsel for the Governments of Spain, Chile, Argentina and Honduras in Southern California for over 20 years. In that capacity, he provides legal services to their Consulates General and Trade Offices in Southern California and their respective Embassies in Washington DC.