Dennis P. Cassidy age 71 of Des Plaines, Illinois passed away on December 22, 2018. Beloved husband of Christine (nee Grabowski) for 28 years. Loving stepfather father of Kerry (late Robert) Corrigan. Proud grandfather of Ross, Brett and Cassidy. Dear brother of James (Barbara), Donald (Roberta), Robert (Chris), Richard (late Nancy), Nancy, Patricia (Jack) Karch, Jerry (Mimi), Kevin (Carol), Thomas (Janet), Martin (Marcia), Jeffrey (Fran), late George, Jr. (Hao) and the late Julie Carlson. Mr. Cassidy was a Navy Veteran, a member of Moose Lodge #714 in Mendota, IL., VFW Lodge 4079, Mendota, IL., and the Elks Club Lodge 1526 in Des Plaines, IL. Visitation for Mr. Cassidy will be taking place on Friday, January 4, 2019 beginning at 10:00 a.m. until time of funeral mass at 11:00 a.m. at St. Zachary Catholic Church, 567 W. Algonquin Road, Des Plaines, IL., 60018. In lieu of flowers, memorials may be made to Illinois Elks Children's Care, 495 Lee Street, Des Plaines, IL., 60016. Funeral care provided by G.L. Hills Funeral Home. For information please call (847) 699-9003 or glhillsfuneralhome.com.