LAS Piñas Rep. Mark Anthony Santos yesterday revealed that four construction firms owned by embattled contractor Sarah Discaya have secured 13 flood control and national infrastructure projects in the city over the past three years, amounting to approximately ₱452 million.
Santos blasted Discaya’s denial, pointing to DPWH records that expose her firm’s ₱18.9-million Alpha & Omega flood control project in Barangay Zapote as a glaring failure—showing only 26.41 percent completion when the construction deadline lapsed in August 2025.
Aside from Alpha & Omega General Construction and Development Corp., Discaya’s other firms—St. Matthew General Contractor and Development Corp.; Amethyst Horizon Builders and General Contractor; and Great Pacific Builders and General Contractor Inc.—also cornered several multi-million-peso projects in Las Piñas from 2022 to 2025.
At the hearing of the Senate Blue Ribbon Committee, Discaya answered in the affirmative when asked if she owned the nine firms.
Alpha & Omega is among the top 15 contractors for flood control projects, cornering about ₱100 billion of the ₱545.6-billion budget from July 2022 to May 2025, according to President Ferdinand Marcos Jr.
Santos disclosed that the DPWH Las Piñas–Muntinlupa District Engineering Office, then headed by embattled District Engineer Isabelo Baleros, awarded Alpha & Omega a ₱49-million contract in February 2022 for the construction of a flood control structure along Mahabang Ilog, Barangay Zapote.
Just a month later, the same DPWH office handed another ₱49-million flood control project in Mahabang Tubig, Zapote to another of Discaya’s firms, St. Matthew General Contractor and Development Corp, the neophyte lawmaker said.
Discaya’s Great Pacific Builders and General Contractor Inc. secured a ₱26.3-million contract in February 2023 for a flood control project along Manarigo Creek.
Barely a month later, in March 2023, another ₱49-million flood control project for Paliwas Creek was awarded to Amethyst Horizon Builders and General Contractor—one of the nine construction firms owned by the Discayas.
All flood control projects in Las Piñas from 2022 to 2025 awarded to the Discayas’ construction firms were confirmed by DPWH Undersecretary for Technical Services Ador Canlas.
“Records speak louder than claims. The Discayas’ repeated awards in Las Piñas are documented, and they cannot hide behind denials or excuses,” Santos pointed out.
Canlas further informed Santos that nine multi-million-peso government infrastructure projects had been awarded to the four construction firms of the Discayas.
These included the ₱9.7-million road rehabilitation in Barangay Zapote, the ₱6.8-million road rehabilitation in Barangay Talon 5, and the ₱9.8-million rehabilitation of Las Piñas Elementary School–Central.
All three projects were awarded to Amethyst Horizon Builders in 2022 during the incumbency of Baleros, who had been appointed head of the DPWH Las Piñas–Muntinlupa District Engineering Office in August 2018 under former Secretary now Sen. Mark Villar.
Discaya’s Great Pacific Builders further solidified the family’s stranglehold on Las Piñas infrastructure by securing the ₱4.8-million school building rehabilitation in Barangay Talon 1 in 2023.
This were followed by two ₱14.4-million multi-purpose building rehabilitations in 2024—in Barangay Manuyo Dos and Barangay Pulang Lupa Dos—underscoring a clear pattern of cornering lucrative government contracts.
