Karen L. Sickler (Hackman), age 76, of Allentown, Pennsylvania, passed away peacefully in her home, on Friday, May 8, 2026. Born on September 29, 1949, in Hellertown, she was the beloved daughter of the late Harold Hackman and the late Jean L. Eisenhart.

Karen dedicated many years to serving others as a caregiver at Step by Step, where her compassion and kindness touched countless lives. She found great joy in simple pleasures. She loved listening to live music, dancing, and spending time outdoors. She especially cherished sunny days, sitting in the warmth of the sunlight and breathing in the fresh air. Above all, Karen was known as the best grandma in the world. Her love for her grandchildren was boundless, and she filled their lives with warmth, laughter, and cherished memories.

She is survived by her children: Kelly Hernandez, Michelle Schlesener, Michael Rabel and his wife Jean, and Jessica Heisey and her husband Brandon. She is also survived by her grandchildren: Riley, Maranda, Jolene, Cora, Alexzander, Adalyn, Gianna, Kylee (whom she lovingly called Mario), and Sincere. Among her surviving siblings are Barbara Hackman-Bannon and Ronald Hackman and his wife Claudette Carr. She was preceded in death by her sister, Wanda Irby.

Karen's gentle spirit, devoted heart, and unwavering love for her family will be deeply missed by all who knew her. Her memory will live on in the hearts of her children, grandchildren, and everyone whose life she brightened with her presence.

Services : Services will be private and held at the convenience of the family.

Contributions : In lieu of flowers, memorial contributions may be made in Karen's name to St. Jude's Children Research Hospital, 501 St. Jude Place, Memphis, TN 38105 and/or Autism Cares Foundation for Autism Awareness, 816 Second Street Pike, Southampton, PA 18966.