After MA in law he joined in Brihanmumbai Municipal Corporation (BMC) as an officer, but later started the Kohinoor technical/vocational training institute with the idea of an institute for semi-skilled youths to offer training as electrician, plumber, TV/radio/scooter repairman, photography.
Manohar Joshi also founded the Kohinoor Business School & Kohinoor-IMI School of Hospitality Management in Khandala, Maharashtra.Later on took Chancellorship of Dnyaneshwar Vidyapeeth.