John Fisher was admitted as a solicitor of the High Court of Hong Kong in 2011. Before then he was admitted to the Bar of England & Wales in 1995, and has worked in England and since 1995 in Hong Kong for difference solicitors firms.

He was part of the team which obtained a landmark judgment in the Court of Final Appeal in 2001 declaring a reputed thousand-year-old Taoist temple and approximately $300 million in assets to belong to a major New Territories clan.

His practice has included a range of litigation matters including complicated trust and property disputes over New Territories land, injunctions, taxation of costs, applications for admission of overseas counsel, contract and tort claims, contempt proceedings, cross-border claims, defamation claims, challenges to jurisdiction of the Hong Kong courts, and more recently company and winding up matters involving substantial medium sized businesses based in Hong Kong and PRC.  One of his recent cases (2016) resulted in the setting aside of a 6 years old default judgment in defamation against his client by the Court of Appeal, which appears to be the first example of its kind in Hong Kong.