Alvin Gler Alonzo

Alvin Gler Alonzo holds the position of Punong Barangay in Barangay Balong-Bato, a barangay in the City of San Juan, serving the 2023 - 2026 term. As Punong Barangay, Alvin leads the elected Sangguniang Barangay and represents the community's local government unit.

The Punong Barangay is the chief executive of the barangay, the smallest and most local unit of government in the Philippines. Duties under Section 389 of RA 7160 include enforcing barangay ordinances, organising and leading an emergency response team, calling and presiding over sessions of the Sangguniang Barangay, maintaining public order through the Lupong Tagapamayapa (peace council), and supervising the delivery of basic services to residents.

Barangay Balong-Bato is one of 21 barangays in the City of San Juan, in the NCR region of the Philippines.

Elected through the Barangay and Sangguniang Kabataan Elections, Alvin Gler Alonzo 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.