Leonardo Tapel Castillon JR.

Leonardo Tapel Castillon JR. holds the position of Punong Barangay in Barangay Basag, a barangay in the municipality of Sen. Ninoy Aquino, serving the 2023 - 2026 term. As Punong Barangay, Leonardo leads the elected Sangguniang Barangay and represents the community's local government unit.

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 Basag is one of 20 barangays in the municipality of Sen. Ninoy Aquino, in the province of Sultan Kudarat, in the SOCCSKSARGEN region of the Philippines. According to the 2020 Census of Population and Housing, Barangay Basag had a population of 2,113 residents — the constituency that Leonardo serves as Punong Barangay. Sultan Kudarat is classified as a 1st by the Bureau of Local Government Finance.

Elected through the Barangay and Sangguniang Kabataan Elections, Leonardo Tapel Castillon JR. 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.