John ("Jack") A. Janiszewski passed away peacefully on April 9, 2023 at the age of 73. Beloved husband of Eleanor ("La") (nee Keyser). Loving father of John C. Janiszewski, Kristy E. Eleftheriou (Stamatis), and Timothy J. Janiszewski (Kimberly). Son of the late Elizabeth and Edward Janiszewski. Dear grandpop of Emma Rose, Savannah, and Sarafina. Brother of Linda McKenty (Thomas), Dennis Janiszewski (the late Elsie), and the late Elizabeth Taylor, Edward Janiszewski, and Maryann McPherson (the late Stanley); brother-in-law of Pat Taylor and Joanne Janiszewski. He is also survived by many loving nieces and nephews. Jack was the lead engineer at Nabisco for more than 25 years. He would do (and did) anything for his family; they were his priority always. He was an avid Phillies fan and rarely missed a game. Relatives and friends are invited to gather on Saturday April 15, 2023 at St. Katherine of Siena Church, 9700 Frankford Ave. Phila., PA 19114 from 9:30 AM – 10:45 AM followed by his Funeral Mass 11:00 AM. Interment Resurrection Cemetery. In lieu of flowers, donations in his memory to the American Cancer Society, 1626 Locust St. Phila., PA 19103 would be appreciated.