He is parliamentary party leader for the Loktantrik Samajwadi Party, Nepal in the Provincial Assembly of Province No.

[4] He was the Physical Infrastructure Minister for Province No.

[5][6] He including 3 other state ministers were replaced by other ministersfrom Lalbabu Raut ministry on 6 June 2021 after a group of PSP-N joined government led by KP Sharma Oli and Sonal supported the same.

Sonal was re-elected as the member of provincial assembly of Madhesh Pradesh from Bara 4(B) in 2022.

He currently serves as the provincial president of Loktantrik Samajwadi Party, Nepal (Madhesh Pradesh) under the leadership of Mahantha Thakur.