Thiraphong Chansiri is CEO of Thai Union Group, the world's biggest exporter of canned tuna, with reported a net profit of THB7.1 billion in 2022. He is the eldest son of Kraisorn Chansiri, who chairs the company.

Thai Union has announced SeaChange 2030, a sustainability initiative with a number of goals that includes the reduction of greenhouse gas emissions by 42 per cent by 2030, achieving net zero by 2050. Thirapong Chansiri's commitment to fostering innovation and sustainability earned him the Thailand Innovation Excellence Award in 2020. That same year, he was named Thailand’s Best CEO at the 10th Asian Excellence Awards.