JJ is one of the country’s leading information and technology law experts, running the University of the Philippines first research program on the internet and society. He drafted the implementing rules for the E-Commerce Act and later co-drafted the Rules on Electronic Evidence. He was petitioner and lead counsel in Disini v. The Secretary of Justice, where he argued against the privacy violations of the Cybercrime Prevention Act.
He has studied and commented extensively on the Data Privacy Act and its implementing rules, speaking before media and the business community about the ramifications of the new privacy law. He is also working on a book on privacy jurisprudence in the Philippines, as well as an online course on data privacy.