Dalmau worked as a law professor, before politics. Dalmau served as a Legislative Adviser for Senator
Manuel Rodríguez Orellana and
Fernando Martín, before being elected to serve as Party Commissioner in Municipality Affairs and PIP Secretary General. He currently serves as the Electoral Commissioner of the
Puerto Rican Independence Party to Puerto Rico's State Electoral Commission (CEE), in addition to his position as secretary general. In 2020, several days after the election, Dalmau announced he would join the political analysis team of local news chain
Noticentro al amanecer. He ran again for governor in
2024, where he came in second with 31.82% of the vote. His platform contained a focus on animal welfare; the first gubernatorial candidate in Puerto Rico to cover the topic in his campaign. Dalmau also campaigned against the tax advantages granted to the rich who come to Puerto Rico. In April 2025, Dalmau organized a conference at Harvard University and an academic meeting at the University of Chicago for the Puerto Rican diaspora in the United States. In July 2025, Dalmau declared himself in favor of a possible alliance with
MVC, for the election in 2028. ==Personal life==