[3] An engineer by profession, Mohan started writing plays and established his own drama troupe called "Crazy Creations" in 1979.

[1] The Tamil Nadu state government in the year 2004, awarded him the Kalaimamani title for excellence in the field of arts and literature.

[1][7][8] It was followed by scripts for his younger brother Maadhu Balaji's drama troupe at Ramakrishna Mission Vivekananda College, Chennai.

[10] He went on to write dialogues for several comedy films, particularly starring Kamal Haasan, which include Sathi Leelavathi, Kaathala Kaathala, Michael Madana Kama Rajan, Apoorva Sagodharargal, Indian, Avvai Shanmughi, Thenali, Panchathanthiram and Vasool Raja MBBS.

Professional excellence award[18] by The Governor of Maryland, USA, for his outstanding contributions to Tamil literature, fine arts, theatres for more than 38 years.

The proceeds from the sales of his book- 'Crazy about Ramana' are re-directed towards educating Indian culture and values to poor children studying in Government schools.

As a script and dialogue writerWeb series Mohan complained of stomach pain and breathlessness in the morning of 10 June 2019.