SULLIVAN - Mark W. Of Lackawanna, NY, November 12, 2024. Loving son of Sharon A. (Schiefer) and the late Maurice J. Sullivan; cherished companion of Laura Lane; brother of Timothy R. (Janice), Kevin J. and Matthew J. Sullivan; also survived by nieces and nephews. No prior visitation. A Celebration of Life Service will be held at the convenience of the family. Arrangements by: CASTIGLIA FUNERAL HOME, INC., 873 Abbott Rd., South Buffalo, NY, (716) 824-6435. Please share your condolences at: www.castigliafuneralhome.com