Mr Michael Castiel > Hassans > Gibraltar, Gibraltar > Lawyer Profile

Madison Building
GX11 1AA

Work Department

Corporate & Commercial


Michael is a former senior partner of the Firm and continues to assist the team as a Consultant on cross-border corporate and tax structuring for global corporate groups and international institutions.

Michael specialises in international tax, corporate and business law regularly advising major US, Canadian and European multinationals and his expertise extends to corporate structuring and restructuring, joint ventures, mergers and acquisitions as well as reorganisations and insolvency having previously advised both receivers and liquidators in a number of high profile cases.

Michael first studied business administration and management and worked in UK industry for eight years after which he studied law at East London University and at the Inns of Court School of Law and was called to the English and Gibraltar Bar in 1993.


English, Spanish, French and Portuguese.

Lawyer Rankings

Gibraltar > Commercial, corporate and M&A

(Hall of Fame)

Michael CastielHassans

Continuing to dominate the market, Hassans is a popular choice for clients seeking advice on corporate structuring, joint ventures, capital duty and tax planning. James Levy has a substantial private client practice and has frequently been called upon by the Government of Gibraltar to assist and advise in respect of financial services, tax and trusts legislation. Senior partners Michael Castiel and Abigail Cornelio remain leading figures for M&A, corporate governance and financing transactions. Cornelio also advises high-net-worth families on business matters as well as structuring aspects of their business. Other key partners include Peter Montegriffo, Vikram Nagrani and Ian Felice.

Gibraltar > Tax

(Leading individuals)

Michael CastielHassans

Benefitting from a deep bench of tax specialists, Hassans‘ core team includes Michael Castiel, a senior consultant in international tax, corporate tax and structuring, and Grahame Jackson, who specialises in international property investment structures. Tim Garcia leads the cross-border corporate tax team, complemented by Isaac Levy‘s work with high-net-worth individuals in the tax structuring of their investments. The team is well qualified to assist in matters involving family and estate tax planning, property and residential status. Francis Carreras focuses on tax structuring/restructuring and the relocation of companies and individuals to Gibraltar, and local tax investigations.

Comparative Guides

Gibraltar: Mergers & Acquisitions March 2023 This country-specific Q&A provides an overview of Mergers & Acquisitions laws and regulations applicable in Gibraltar.