Aside from his work in New Music, Rumrill is a committed activist for social justice. This work, a constant over the last decade and a half, has taken many forms. He has worked to end the abuses of sweatshops in the overseas production of apparel. He was an advocate on behalf of himself and others who were arrested at the Republican National Convention in 2000. He worked with residents of the Southside community in Syracuse to confront the County’s racially biased plans to demolish homes to build a sewage treatment facility. He worked with public housing residents in New Orleans after Katrina, as they tried to return to their homes.