Sullivan, Mark D. of Lawrence, formerly of Stoneham. July 23, 2015. Beloved son of the late Leonard and Barbara Sullivan. Loving brother of Leonard Sullivan Jr. of Melrose and Stephen Sullivan and his wife Janice of Aktinson, NH. Devoted uncle of Colleen and Cassandra. Nephew of Ellen Sullivan of Deerfield Beach FL. Also survived by many cousins. A memorial visitation will be held at the Keefe Funeral Home, 5 Chestnut St., Arlington on Monday August 10, 2015 from 10-11 am, concluded by a prayer service at 11 am. Burial is private. Online condolences at www.keefefuneralhome.com