Charles S. Klimaszewski, Jr., "Klem", 86 of Newark passed away peacefully on Tuesday, February 9, 2021 at Millcroft Senior Living Community. Klem was born in Yorklyn, the son of the late Mary (Kozlowski) and Charles Klimaszewski. He graduated from A.I. DuPont High School and worked as a laboratory technician at the DuPont Experimental Station for 33 years. He was a former parishioner of St. Catherine of Siena Church in Wilmington and St. Dennis Church in Galena, MD. Klem was always involved in athletics, playing baseball for Yorklyn and softball for Worthey Brothers. He was a huge UD Blue Hens sports fanatic and attended countless football, basketball and baseball games. Klem and Laura retired to Crystal Beach Manor in Earleville, MD where they enjoyed several happy years. Klem is survived by his wife of nearly 64 years, Laura (Schandel) Klimaszewski; his daughters, Janet Klimaszewski of Wilmington and Annette Klimaszewski of Dunellen, NJ; his son and daughter-in-law, David C. and Vonda Klimaszewski of Dallas, TX; his granddaughters, Riley, Violet and Phoebe and his step granddaughters, Julia and Katherine. A Memorial Mass will be celebrated on Saturday, September 11, 2021 at St. Catherine of Siena Church, 2501 Centerville Road, Wimington at 11 AM. Funeral services and burial at All Saints Cemetery were private.