His first feature film Footsteps, starring Soumitra Chatterjee and Nandita Das, won 2 National Awards in 2008.

His second feature film Dwando, also starring Soumitra Chatterjee, was a part of the Indian Panorama at IFFI Goa in 2009.

His latest feature film Shyamal Uncle Turns off the Lights has had a warm reception from critics and audiences all over the world.

The film, based on a true incident, traces the journey of Shyamal Uncle, an eighty-year-old retiree, as he wades through an apathetic system with a seemingly trivial goal – turn off the street lights near his home which are left on even during the day.

Colin Burrows is the executive producer and it is being distributed in North America by Global Film Initiative.

Vincent Malausa at Cahiers du Cinéma calls it "extraordinary magic …..leads to one of the most beautiful happy endings we have ever seen" and "The impeccable rhythm and the art with which the director deals with new twists….invite the audience to understand that a true epic is told in the small adventure."

Another reviewer notes that "With echoes of Kurosawa’s ‘Ikiru,’ the great 1952 Japanese film about a low level bureaucrat who gets a playground for a neighborhood, and solidly in the tradition of the Indian realism of Satyajit Ray—Pather Panchali and the Apu Trilogy, Suman Ghosh, the writer and director, establishes himself as an important filmmaker in the 21st century."