Mark “Billy” Rosen-Of Southborough, on April 19, 2018. Beloved husband of Marilyn (Fishman) Engelman. Devoted father of Julie Maccini and her husband Richard, Jeffrey Rosen and his wife Diane, Andrew Rosen and his wife Amanda, Joshua Rosen and Joshua Engelman. Dear grandfather of Sarah and Rachel Maccini, Abigail and Katherine Rosen and Hannah Rosen. Loving brother of Brenda Bellin and her husband Ronald. Dear son in law of Irene Fishman. Services at Congregation Or Atid, 97 Concord Rd., Wayland, on Sunday April 22, 2018 at 1:00 pm. Following interment at Sharon Memorial Park, a memorial observance will be held at his residence until 9:00 pm and Monday and Tuesday 2-4, 7-9 pm.In lieu of flowers remembrances may be made to Dana Farber Cancer Institute, P.O. Box 849168, Boston, MA 02284 (on memo line” Dr. Choueiri Research funds”) or Congregation Or Atid.