In the 2019 Philippine general election, Ungab ran unopposed under the regional party Hugpong ng Pagbabago, founded by then-Mayor Sara Duterte.

In 2024, he switched allegiance to Hugpong sa Tawong Lungsod, the local party founded by former President Rodrigo Duterte.

On February 2025, Ungab announced plans to challenge the 2025 General Appropriations Act (GAA) before the Supreme Court.

He raised concerns over how alleged blanks in the bicameral conference committee report were filled before finalizing the national budget law.

Before entering politics, he worked as a bank manager, economic analyst, and account officer.