Fernando was responsible for delivering many judgments during his career, that upheld the rights of citizens in respect of the right to vote, the right to freedom of speech and the right to freedom against torture and arbitrary arrest and detention.
At the passing away of Justice Mark Fernando, the Alumni Association of the Faculty of Law (AAFL) issuing a special message stated that "No other judge has perhaps contributed as much towards the progress of legal jurisprudence in this country as Justice Fernando.