Martin is a barrister at Central Chambers with a broad civil and criminal practice, and has been involved in cases at all levels, including the Court of Final Appeal. Alongside his practice, Martin is also a lecturer at the Chinese University of Hong Kong, City University of Hong Kong, and (previously) the University of Law. Further, he frequently reports on the latest leading cases in the Hong Kong Law Reports & Digest and the Hong Kong Court of Final Appeal Reports.

During his undergraduate law studies at the Chinese University of Hong Kong, he ranked first in his year (in 2010 and 2011) and in criminal law. In PCLL, he was awarded his wig and gown and the Hong Kong Bar Association Prize for Trial Advocacy for best performance in trial advocacy. He also graduated with a Master of Laws from the London School of Economics, coming top in the Corporate and Securities Law specialism and in the Corporate Governance and Secured Financing courses.

Martin was appointed as a Middle Temple Scholar in 2017 and Patrick Yu Memorial Scholar in 2022. Under the former scholarship, he received advocacy training with the English Bar at Middle Temple, London, as well as with the Cape Bar in South Africa.