He started his service from the reign of King
Nangklao. Later, in the reign of King
Mongkut, he became
Chao Muen Vaiwaranart, the head of the ten thousand servants. as chargé d'affaires, followed Phraya Sriphiphat (Pae Bunnag), who is the ambassador established diplomatic relations in Paris,
Second French Empire in 1860. Later, he was graciously pleased conferred a title as
Phraya Surawongwaiwat, Chamberlain and was for an ambassador to France once again to meet with
Emperor Napoleon III in 1866. In the early reign of King
Chulalongkorn, he graciously promoted the title of
Chao Phraya Surawongwaiwat at Samuha Phra Kalahom, Fief 10,000. In 1869, he held the position of Samuha Phra Kalahom for 19 years until his death in 1888. People commonly called
Chao Khun Thahan or
Chao Khun Kalahom and this name became the name of
King Mongkut's Institute of Technology Ladkrabang later. == References ==