S. Cyrus Sepher's writing career began when he got the attention of Robert De Niro for his action thriller Bus 657, later renamed HEIST in US. He played the role of DANTE in the film along side Dave Bautista and Jeffrey Dean Morgan. He is an alumni of the Actors Academy with Lewis Smith, Candy Herman & Rick Walters studio.

Sepher wrote, directed and produced the film DEAD ON ARRIVAL which was nominated for best screenplay, best director and best picture at the Arpa International Film Festival in Los Angeles. The film was distributed by Sony Pictures Home Entertainment. He co-starred with Bruce Willis in the film Deadlock and Executive Produced the film Vendetta with Willis. He has numerous projects in different stages in development as a writer, actor, director and producer.