Born on August 8, 1948 in Pasay City, Justice Presbitero J. Velasco, Jr. is a product of the public school system. He went to J. Sumulong Elementary School (First Honorable Mention) and the University of the Philippines (UP) Preparatory School, respectively, for elementary and high school.
He obtained his Bachelor of Arts Degree in Political Science from UP finishing the course in only three years. He went on to take up his Bachelor of Laws from the same university. At the UP College of Law, Justice Velasco was a member of the Order of the Purple Feather Honor Society and served on the Editorial Board of the Philippine Law Journal. He graduated eight in the class of 1971 with a grade of 1.79. He placed sixth in the Bar exams that same year with a grade of 89.85%.
He engaged in private law practice for 20 years before joining the public sector as a regular member of the JBC in 1993.
Justice Velasco also served as Undersecretary of the Department of Justice from 1995 to April 1998. He was concurrently Commissioner of the Housing and Land Use Regulatory Board. He was also Chairman of the Board of Pardons and Parole, Commissioner of the Commission on Settlement and Land Disputes, and Member of the Committee on Privatization.
In 1998, he was appointed Court of Appeals Justice. He was ranked eight in disposition of cases when he was named Court Administrator in 2001.
Justice Velasco has 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. He was Member of the Board of Governors for the term 1985-87 and Vice President for Southern Tagalog Region. He was also the Cavite IBP Chapter President for the term 1985-1987.
He was the President of the Quezon City "Capitol" Jaycees from 1986-87. It was during his term that the Capitol Jaycees was adjudged the "Most Outstanding JC Chapter in Asia-Pacific". In 1988, he was elected the National Executive Vice President (NEVP) of the Philippine Jaycees in charge of Metro Manila.