Mr. Sunh Arunrugstichai holds a Master of Arts (with Distinction) in Political Science from the University of Canterbury in New Zealand. He joined the Ministry of Foreign Affairs of Thailand in 2004 as a Third Secretary in the Office of Policy and Planning, and later a Second Secretary in the Office of the Minister.

His first overseas posting was at the Thailand Trade and Economic Office in Taipei, where he served from January 2007 to December 2010. He then took on a role at the Royal Thai Consulate General in Los Angeles from July 2013 to July 2017. After his time in Los Angeles, Mr. Arunrugstichai served as the Deputy Director of the Passport Division at the Department of Consular Affairs from July 2017 to July 2021.

In August 2021, he assumed his current position, where he focuses on strengthening ties between Thailand and Taiwan across various dimensions.