Mario Cabatbat Isaac

As Punong Barangay of Barangay Agumaymayan, Mario Cabatbat Isaac presides over the Sangguniang Barangay of the barangay in Boac, Marinduque, serving the 2023 - 2026 term. The Punong Barangay is a nationally recognised local government position under the Local Government Code of 1991 (Republic Act No. 7160).

Under the Local Government Code of 1991, the Punong Barangay leads the Sangguniang Barangay, signs ordinances and resolutions, represents the barangay in transactions with other government units, administers the barangay budget and appropriations, and oversees the Lupong Tagapamayapa that handles amicable settlement of disputes at the barangay level. The office is the most directly accountable elected position in the Philippine government.

Barangay Agumaymayan is one of 61 barangays in the municipality of Boac, in the province of Marinduque, in the MIMAROPA Region region of the Philippines. According to the 2020 Census of Population and Housing, Barangay Agumaymayan had a population of 594 residents — the constituency that Mario serves as Punong Barangay. Marinduque is classified as a 4th by the Bureau of Local Government Finance.

Elected through the Barangay and Sangguniang Kabataan Elections, Mario Cabatbat Isaac is serving the current four-year term established under Republic Act No. 12232, which extended the barangay official's term from three years to four. The next BSKE will be held on Monday, November 2, 2026, following COMELEC Resolution No. 11191.

A Philippine barangay's Sangguniang Barangay is composed of one Punong Barangay, seven Sangguniang Barangay Members (kagawads), a Sangguniang Kabataan (SK) Chairperson representing the youth sector, a Barangay Secretary, and a Barangay Treasurer. Together, these officials administer the smallest unit of Philippine local government and deliver frontline services — from barangay clearance issuance to peace and order, from public health assistance to the barangay's share of the Internal Revenue Allotment.