Jaswant initially started working for government job and stayed with it for a long time. Since his childhood he had a passion for singing and a hobby for writing songs.

In his college time, he used to sing songs his class fellow. He performed Bhangra in collage festivals and actively took part in various cultural activities.

Jaswant got initial guidance from his master Late of “Bakar Hussain” and “Sajjan Rai Kotti”. His first song “ADHI RAAT TAK MEIN PARDI” voiced by Harcharn Grewal and seema is still a very famous song in Punjab. Among other songs in his famous collections as
“TERA PICCHA JATTIA NE GHAR CHADIA”
“IK KURI KOONJH WARGI”
“MUNDYIA NU SANGAT KHARAB MARDI”
“JADO MERA LUCK HILDA” etc to name few.

Many Punjabi singer say his song are similar to K. DEEP, JAGMOHAN KAUR, A.S KANG, SURINDER SHINDA, KULDEEP MANAK, SAIDA BAANO, PARMINDER SANDHU, KAMALJIT NEERU.

 Sandila wrote aprroximately 150 songs in his life which were sung and voiced by different punjabi singers. He himself sang approximately 90 of his own songs. Few of his famous punjabi duet songs are "PALLE PAI GAYA AMLI” “DHOLAN BAIKADRA” “NALE CHOR NALE CHATRIAYIA” “SADHI HOI MITRAN DEE” “CHADNA SHEHAR LUDHIANA” etc.

He recorded his first duet song with Parminder Sandhu  “AUKHI HO JU KANDH TAPP NEE” in 1982. Then his some solo cassettes in market for expel “KURHI DIL LYE GAYE”, “DIL TA HATH DHARKE” and “ISHQ DEE KHED”. Jaswant also performed for radio during 1985 and also for T.V in 1989. 

Many of his duets songs were along with Parminder Sandhu and with Kuldeep Kaur.

His first cassette “KIVEN JAVA TENU BHUL” was directed by Rimpy Ahuja and Hardeep Deepi. Music director was Pushpinder Singh from Sukh Mann cassette Company and lyrics were his own, Jaswant Sandila along with Amarjit Bagli, Pamma kotpuria, Heera Pammapuria.

He performed many stage show in Canada and England. He was awarded may awards in abroad and in punjab.