Mario was a leader in the food retail industry for most of his working life including owning a number of shops in Gibraltar. He decided to study law as a mature student and read for a degree at Southampton Institute of Higher Education (now Solent University). On graduation he studied in London, qualifying as a Barrister and was called to the Bar of England and Wales at the Middle Temple Inn after which he was admitted to the Bar in Gibraltar and began practice with Cruzlaw in the area of commercial litigation and conveyance.
In 2003 he left Cruzlaw on appointment as Gibraltar’s second Public Services Ombudsman, a post he held for fifteen years during which he developed his office into a centre of excellence. After finally stepping down he re-joined Cruzlaw as the Consultant to the Acquarius Trust Group assisting the team with all legal matters. Mario is currently an additional member of the Public Services Commission.
He has served as member of the Legal Services Regulatory Authority and the Police Complaints Board and is also involved in different aspects of social work and is the chairman of a charitable organisation. In 2019, he was awarded the Gibraltar Medallion of Distinction by the Gibraltar Parliament.