Mandar was in charge of Mumbai University choir group for five years. He has been accompanying Padmashri Padmaja Phenany Joglekar on keyboard and harmonium since 18 years. He has been accompanied many artists Ravindra Sathe, Ranjana Joglekar, Shridhar Phadke, Jaswinder Singh.
He is working with Javed Akhtarji and Shabana Azmiji in their show ‘Kaifi aur main’ since 5 years.
He has composing background music for Hindi, Marathi ,Bengali films like ‘Ek alag mausam’ by Nandita Das, ‘Morning walk’ by Anupam Kher, ‘Prem mahnaje prem aste’ by Mrunal Kulkarni
He has composed jingles also like Charminar Cement, Amul coco, for Fame Adlabs. He also composed music for play "Rangila re" by an actor Manoj Joshi.
Mandar has done workshops for NCPA for theatre professionals for actors. Now a days working as a faculty member in drama school Mumbai for theatre professionals travelled for shows in Muscat, Dubai, USA, London, Switzerland, Australia, and Singapore
Mandar is working as a music teacher in Bombay Cambridge international school Andheri (east) since 1996.