Haresh has been the Resident Playwright of The Necessary Stage since 1990, and has written more than 100 plays which have been staged in over 20 cities. He has 10 publications of his plays, and his works have been translated into Malay, Mandarin, Greek and Italian.

Haresh was awarded Best Original Script for Fundamentally Happy, Good People and Gemuk Girls at the 2007, 2008 and 2009 Life! Theatre Awards respectively. He is the first non-American to be awarded the prestigious Goldberg Master Playwright by New York University’s Tisch School of the Arts in 2011.  In 2014, he was conferred the Southeast Asian Writers (or S.E.A. Write) Award (Singapore), and in 2015, he was awarded the Cultural Medallion for his work in theatre.