[1] Tanasith is affectionately dubbed "Taodinho" by Thai supporters[2][3] for his resemblance to the Brazilian star Ronaldinho.

He began his professional career in 2012 at the age of 16, Tanasith was being loaned out by the club in same year to Rangsit to gain experience and toughen up in Khǒr Royal Cup.

He made his professional football debut on 9 January 2012 in 1–1 draw against Dhurakij Pundit University F.C.

Tanasith returned to Bangkok Glass in 2012 Thai Premier League and finally made his league debut for Bangkok Glass on 7 April 2012, in a 2–0 win over Police United at Leo Stadium.

In 2013 season at the age of 17, he made his first goal for Bangkok Glass on 28 September 2013 in Thai Premier League 5–1 win over TOT In 2016 Tanasith Siripala was selected in Thailand U23 squad for 2016 AFC U-23 Championship in Qatar.