In 2013 Stewart co-founded the band BULLY with Alicia Bognanno. BULLY signed with Columbia Records and released their debut album in June of 2015. They toured extensively in the US, Canada, Europe, and Australia. Stewart also handled all the graphic design for BULLY, designing album art, t-shirts, merchandise, and websites. In March of 2016 Stewart stopped touring with BULLY.
Stewart shoot the photographs used in the album art for Bully's second record, LOSING. He also created a short video teaser for the lead single "Feel The Same."