Sunanda's interest in documentaries is to represent people living on the margins of a fascinatingly intricate and stratified Indian society. Unraveling these layers reveal glimpses of lives that are often far more interesting than fiction.
She started Songline Films in 1996 inspired by Bruce Chatwin’s book by the same name. She has made several commissioned films for NGOs on social issues. Her short film 'Ini Oru Vidhi Seyvoam’ (Let's make it right) on rural sanitation won the 'Gold Drop' award at Marseilles in France, while ‘Bol Ayesha Bol’ (Speak Ayesha Speak) was screened at the International Film Festival, Amsterdam.