In 2011, Sullivan was hired as executive director of Marriage Equality Rhode Island, a 501(c)(4) organization. He actively worked to support full marriage equality instead of a "discriminatory" civil unions bill. In 2013, he became campaign director of Rhode Islanders United for Marriage. In 2013, same-sex marriage passed in the Senate in April 2013, and in the House in May 2013. It was then signed into law by Governor
Lincoln Chafee. Sullivan was one of the individuals awarded a House Resolution (H6116). He was committed "to making Marriage Equality possible for all loving and committed couples in the State of Rhode Island" == Campaigns and activism ==