Kaustubh is working since 7 yrs in music industry with stalwarts like Ushaji Mangeshkar, Pandit Hridhainathji Mangeshkar, Falguni Pathak, Dipali Sayyed, Varsha Usgaonkar, Saee Tamhankar, Neha Pendse, Johnny Lever, Sachinji Pilgaonkar, Raju Shrivastav, Sunil Pal, Ankush Choudhary, ZEE Marathi team (FU BAI FU) Digambar Naik, Satish Tare and many more.
The musical events in which Kaustubh performed are as followes:
*SUFI NIGHT (all sufi kind of songs)
*Sangeet Sandhya
*Instrumental music
*Karaoke shows
*Filmstars night
*Standup comedy
*Mehendi night
*Jain sandhya
He also his own one-man show of singing of 1 1/2 hr on live music