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Simha dropped out of college to pursue acting and noted that he would work in business process outsourcing duties for three months, make money and then again start looking for opportunities in cinema. He subsequently got acquainted with short filmmaker Manikandan, who introduced him to his friend, another short filmmaker Karthik Subbaraj, who directed Pizza. The pair subsequently made a series of short films together, with Subbaraj finally giving Simha a role in his directorial debut Pizza.
Simha appeared in Soodhu Kavvum (2013) portraying the role of Pagalavan, and played the antagonist in the bilingual Neram.