Rosemarie Posie” Zimmer, 86, formerly of Gettysburg, PA passed away at The Chambersburg Hospital on Monday, January 11, 2021. Born in Johnstown, PA on February 28, 1934, she was the daughter of the late Rudy & Helen (McKernan) Amershak. Posie was predeceased by her husband, Edward P. Zimmer, Jr. who died in 2019. She was an active member of St. Francis Xavier Catholic Church in Gettysburg. Survivors include her sons, Arthur R. Zimmer of Fayetteville, PA and Thomas E. Zimmer (Leslie) of Westminster, MD, grandchildren, Gabrielle, Zachary and Gunther and great grandchildren, Jack, Charles and Sebastian. Posie was predeceased by a son, Eric, a sister, Kathleen and a brother, Richard. A Mass of Christian Burial will be held at 10:00 AM on Friday, January 15, 2021 at St. Francis Xavier Catholic Church, 45 West High St., Gettysburg with Fr. Daniel Mitzel, Celebrant. Interment will follow the Mass in St. Francis Cemetery. Online tributes and condolences can be made at monahanfuneralhome.com.