Mr Gian Castillero > Arias, Fábrega & Fábrega > Panama, Panama > Lawyer Profile

Arias, Fábrega & Fábrega
PO BOX 0816-01098, PANAMA
Gian Castillero photo

Work Department

Mr Castillero’s practice focuses on private client work, including, estate planning, organization and management of family offices, international tax planning and corporate work.


Mr. Castillero is Head of ARIFA’s estate and private clients group and an a member of the firm’s Compliance Committee. He is the leading partner of the ARIFA Pro Bono and CSR Committee.


Gian Castillero joined the firm in 1994 and became a partner in 2008.

From 1994 to 2000, Mr. Castillero was the resident lawyer of our London office and an active member of the ship finance and registration department of the firm from 2000 to 2006. Later, and until 2013, Mr. Castillero headed ARIFA Corporate Services and its network of offices abroad. 

Mr Castillero serves as senior advisor of the Panamanian Government on matters related to the platform of international services of the Republic of Panama.


Spanish, English.


Director of the Banco Nacional de Panamá (BNP) (2017-Present)

Chairman of the Panamanian International Lawyers Association (2008-Present)

Member of the High Level Committee appointed by the Government of the Republic of Panama for the protection of its international services (2015-2017)

Member of the National Council of Foreign Affairs of the Republic of Panama (2015-2017)

Member of the International Maritime Committee (2007-Present)

Member of the Board of Directors of the Panama Maritime Authority (2013-present)

Member of the Board of Directors of the Maritime University of Panama (2006-2015)

Director of the Panamanian Maritime Lawyers Association (2005-2008)

Chairman of the Committee in charge of drafting the Merchant Marine General Law of Panama and its Regulation Act (2005-2008)

Member of the Executive Counsel of Marviva Foundation (2002-Present)

Fellow of the seventh class of the CALI Foundation (2011-present)

Member of the Board of Directors of the PanVest Fund (2013-present)

President Board of Directors of the LPF Group (Liga Panameña de Futbol) (2015-2016)

Member of the Aspen Global Leadership Network (2011-present)


London University, LLM (1995)
University of Panama, LLB (1994)

Lawyer Rankings

Panama > Offshore

Arias, Fábrega & Fábrega advises on the formation and operation of trusts and foundations and tax planning matters, as well as providing assistance with corporate issues through its affiliate Arifa Corporate Services. With associated offices in London, Hong Kong, the British Virgin Islands, Belize and Uruguay, it is able to advise on a wide range of international matters. Gian Castillero heads the estates and private client group, focusing on estate planning, the management of family offices and international tax planning. Rosa Restrepo assists institutional and private clients with tax, estate planning and corporate structuring. Of counsel LeRoy Watson III is also noted.