His mother is Utsanunt Jirachutinunt and he has a younger brother named Nathanai Adulsuttikul.

[6] He auditioned for the record label 4NOLOGUE in 2018 and debuted as a member of the Thai boy group Nine by Nine, a one-year special project by 4nologue and production company Nadao Bangkok.

[1] As part of the project, he starred in the TV series In Family We Trust (2018) as Kuaitiao and Great Men Academy (2019) as Good.

[6][8] He appeared with Jackrin Kungwankiatichai as the Holvichai-Kavee duo in the 2019 TV singing competition show The Mask Thai Literature.

[10] In September 2019, Sivakorn debuted in another boy group formed by 4nologue namely as TRINITY where he continues to pursue his musical career.