He is a silver medalist in the Weightlifting Men's 61 kg category at the 2024 Summer Olympics in Paris, France.

Born into a middle-class family where his father was a trader in Sisaket, a province in lower Isan (northeast Thailand) bordering Cambodia.

[2] As a youth lifter, Silachai's first known competition was at the Khun Dan Games in Nakhon Nayok, competing in the men's 50 kg category.

[4][5] As a junior, he participated at the 47th Thailand National Games, competing in the men's 55 kg category winning gold in all three lifts.

[7] In 2024 Summer Olympics, he participated at men's 61 kg event and successfully secured the silver medal.