Marquez graduated with a degree in law from the Ateneo de Manila University and became a member of the Philippine Bar in 1994.

[6] President Rodrigo Duterte appointed Marquez as the 192nd associate justice of the Supreme Court of the Philippines on September 27, 2021.

[7] Presidential daughter and Davao City mayor Sara Duterte opposed his bid for a Supreme Court post back in 2018.

She issued a statement saying the Supreme Court aspirant is trying to gain her favor through asking complainants and witnesses to withdraw the disbarment case filed against her for punching a sheriff during a demolition in 2011.

[8] Marquez has also been cited as chiefly responsible for the filed quo warranto against Chief Justice Maria Lourdes Sereno.