Dianne was born in Erie, Pennsylvania to the late Jerome and Jean (Selinger) Riddle.
Prior to retiring, Dianne worked as an administrator for the International Monetary Fund and Sperry Aerospace Corporation.
Dianne was a devoted family member and friend. She was exceptionally loyal, kind and generous.
Dianne is survived by four siblings, Jerome (Liz) Riddle, Jr., David (Lynne) Riddle, John (Terry) Riddle, and Lois (Norm) Atkin, brother-in-law, Chuck Hitmar, and many nieces and nephews. In addition to her parents, Dianne was preceded in death by her husband, James Mangum, and three sisters Shirley Hitmar, Mary Riddle and Patricia Riddle.
A Mass of Christian Burial will be celebrated at 10:00AM, Wednesday, July 5, 2017, at The Church of St. Thomas More, 6180 W. Utopia Rd., Glendale, Arizona 85308, followed by a graveside service at Resthaven Park Cemetery in Glendale.
