Mark Olkowski, 64, of Wilmington, passed away peacefully surrounded by family at Seasons Hospice in Newark, DE, on Tuesday, April 14, 2021. Mark was born in Wilmington, the son of Theodore "Ted" Olkowski Sr. and the late Margaret (Quill). He graduated from Conrad High School and went on to start a career in pipe fitting, working for UA Local 74 Plumbers and Pipe Fitters Union. He was an avid reader, loved animals especially his dogs, and he loved spending time with his family and friends. Mark was predeceased by his mother, Margaret Olkowski; and his sister, JoAnne Mude. Mark is survived by his father, Theodore "Ted" Sr. of Wilmington; his brothers Michael (Pam) of Wilmington and Theodore "Ted" Jr. (Laverna) of Hockessin De; multiple nieces and nephews; and his beloved dog, Kitty Cat. Services and Interment will be held privately. In lieu of flowers, the family suggest donations in Marks's name to Brandywine SPCA, BVSPCA.org, 1212 Phoenixville Pike, West Chester, PA 19380.