Honoring the Memory
of Those
We Love

Age 77, after a brief unexpected illness, on Tuesday, June 30, 2026, of Pleasant Hills.

Beloved husband of 54 years to the late Kathleen M. (Shalley) Peterson; caring and loving dad to Kara (David Wisenauer) Peterson and Michael Peterson; proud Pappy/Papa of Jack, Emma, Netta and Denny Wisenauer; cherished brother of Delwyn (Charlotte) Peterson, Debra (David) Peace and David (Susan) Peterson; brother-in-law to Dr. Ann (Randall) Collins. Also survived by many nieces, nephews, cousins and friends.

Dennis Peterson, a devoted father, grandfather, brother, uncle, educator, coach, and cherished friend, passed away surrounded by the love of his family. His life was defined by his unwavering commitment to his family, his education, his compassion for others, and his ability to bring warmth and laughter to every room he entered. A lifelong resident of the Jefferson Hills community, Denny graduated from Thomas Jefferson High School before earning degrees in Education from California University of Pennsylvania and Duquesne University, and also served four years in the United States Army Reserves as an Intelligence Specialist. He dedicated his professional life to shaping young minds. He begin his teaching career in the Bethel Park School District and concluding as Principal at Jefferson Hills Elementary School; inspiring generations of students. Denny was more than a teacher, he was a mentor, role model, and coach whose influence extended far beyond the classroom. Throughout his career, he coached numerous sports, but perhaps his greatest passion was serving as head football coach at Bethel Park High School. He believed deeply in the potential of every young person and viewed children as the guiding light of the future. His encouragement, leadership, and belief in others left a lasting impact on countless students and athletes, many of whom carried his lessons throughout their lives. Known for his warm heart, compassionate nature, and quick wit, Denny had a remarkable ability to make people feel welcome and valued. His infectious sense of humor brought joy to family gatherings, friendships, classrooms, and locker rooms alike. He lived with kindness, humility, and generosity, touching the lives of everyone fortunate enough to know him. Outside of his career, he found his greatest happiness with his family. He treasured time spent at his beloved cottage in Ligonier, Pennsylvania, where countless memories were made with those he loved most. He enjoyed fishing, cross country skiing, relaxing at the beach, traveling, and embracing life's simple pleasures. Denny leaves behind a legacy of service, integrity, and love. His impact will continue to be felt through the thousands of students, athletes, colleagues, family members, and friends whose lives were enriched by his guidance, kindness, and unwavering belief in others.

He will be deeply missed, forever remembered, and lovingly carried in the hearts of all who knew him.
Friends will be received at the John F. Slater Funeral Home, Inc., 412-881-4100, 4201 Brownsville Road, Brentwood 15227 on Tuesday, July 7, 2026 from 12-8 p.m. and Wednesday, July 8, 2026 from 10:00 a.m. until the time of his blessing service at 11:00 a.m. In lieu of flowers, family suggests contributions to Brentwood Public Library, 3501 Brownsville Road, Pittsburgh, PA 15227.