I engaged in private law practice for 20 years before joining the public sector as a regular member of the Judicial and Bar Council in 1993.

I served as Undersecretary of the Department of Justice from 1995 to April 1998. I was concurrently Commissioner of the Housing and Land Use Regulatory Board. I was also Chairman of the Board of Pardons and Parole, Commissioner of the Commission on Settlement of Land Disputes, and Member of the Committee on Privatization.

In 1998, I was appointed Court of Appeals Justice. I was ranked eighth in disposition of cases when I was named Court Administrator in 2003.

I have also served the Integrated Bar of the Philippines (IBP) in several capacities: as its National President in 1987, as Commissioner of the IBP Committee on Bar Discipline, and as Honorary Chairman and Past National Co-Chairman of the IBP National Committee on Legal Aid.

I was awarded Most Outstanding Jurist by the Consumers Union of the Philippines in 2000.

Supreme Court of the Philippines
I was appointed Associate Justice of the Supreme Court of the Philippines by President Gloria Macapagal Arroyo on March 31, 2006.

Governor of Marinduque
In 2018, I filed my candidacy for Governor of Marinduque for the 2019 elections in which I won ending the rule of the Reyes clan, which has ruled Marinduque for almost two decades.