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Dennis G. Peterson

April 24, 1949 - June 30, 2026

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Obituary For Dennis G. Peterson

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.

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  • July 20, 2026

    Jim Horner

    Having known Denny from our days with the Bethel Park School District, the fond memories are countless. I was Pete's principal at the middle school level and we just loved his smile, laughter, and kindness toward students, parents, fellow teachers, and all who came in contact with Mr. Peterson. Pete, Dave H., and I spend many years after school in the weightroom trying to impress each other. Pete was a wonderful educator and dear friend. Jim Horner, Principal-Bethel Park High School, South Park High School, Peters Township High School.

  • July 14, 2026

    Remy Zandier

    I will never forget dancing down the hallways with him on the way back from the cafeteria or laughing preparing for the morning announcements. He was an amazing person that left such a positive impact on me and the elementary education system. Sending love and prayers.

  • July 12, 2026

    George H. Wilson

    Denny and I were classmates at Thomas Jefferson. I coached for Denny at Bethel Park and he was loyal, hard working, and a true gentleman, win or lose. I will miss him and so will his friends at school and the coaching fraternity.

  • July 09, 2026

    Sandy Pulaski

    I remember Denny so well. I came to know him through the Dorans . He was so much fun! He will be sadly missed. Sandy Pulaski

  • July 08, 2026

    Ashley Trimnal

    Mr. Peterson was my principal in elementary school. He was by far my most favorite person. I am now 32 and still remember everything he ever told me. Very saddened to hear this news. RIP Mr. Peterson

  • July 07, 2026

    Eric Hrivnak

    Coach Pete was instrumental in preparing me to be successful in the military and in life. He taught us the team is always more important than an individual. Work ethic, discipline, working through pain, whether emotional or physical, are core values to be successful. He wrote me a nice recommendation letter for my USAF Pilot Training Application, which I greatly appreciated. Tailwinds Coach Pete on your final journey west. RIV

  • July 04, 2026

    Edna Williams

    I remember Mr Peterson with the school district. He will be missed. RIP. My sympathy to the family.

  • July 03, 2026

    Kristine Shelpman

    May God accept this man with open arms who had the faith in me to become a Paraprofessional. There will never be another principal like you Denny. You will be missed by everyone❤️

  • July 03, 2026

    Dr. Richard G. Hufnagel, Jr.

    Coach Pete, Thank you for always pushing us to be the best we could be, even when we didn't believe in ourselves you believed in us!! So many great memories in the wrestling gym at Bethel Park High! You were a true mentor, coach, friend and father figure!! Thanks for everything Coach!! Rest in peace! -Dr. Richard G. Hufnagel, Jr.

  • July 02, 2026

    Josh

    He was so friendly and a sweet guy I enjoyed of getting to know him I will definitely be missed a lot

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