Sister Mary Henry Simoneaux was a Sister of Mercy for 82 years. She attended four years of grammar school at Plattenville, Louisiana. In October of 1932, she attended St. Alphonsus School in New Orleans, staffed by the Sisters of Mercy. She later attended Redemptorist Girls High School, also staffed by the Sisters of Mercy. Sister received her Master of Education degree at Loyola University, New Orleans, Louisiana.
Sister Mary Henry felt God’s providence had inspired her in her early childhood to want to become a Sister of Mercy. She left New Orleans for Webster Groves, Missouri, to enter the Religious Sisters of Mercy on September 8, 1939. She made her first profession of religious vows on March 12, 1942, in Webster Groves, Missouri, and her final vows with the Sisters of Mercy on August 16, 1945.
Sister Mary Henry began her education ministry in 1942 and has ministered for over 63 years with her teaching skills and as a principal. Sister was missioned as a teacher at St. Alphonsus, Holy Name of Jesus, and Mercy Academy in New Orleans, Louisiana; She became teacher and principal at Our Lady of Perpetual Help in Kenner, Louisiana; St. Joseph School in Jeanerette, Louisiana; Mother of Mercy in St. Martinville, Louisiana; Immaculate Conception; and Trinity Junior High in Fort Smith, Arkansas; and Mercy High School in St. Louis, Missouri. Sister later began volunteer teaching from 1992 to 2005 at Our Lady of Perpetual Help School in Kenner, Louisiana.
Sister Mary Henry retired at Mercy Health Center Convent in Oklahoma City, Oklahoma, on February 18, 2019. Throughout her life sister was willing to help where needed, and she was always supportive, considerate, and compassionate to her family, lifelong friends, Community members, and Convent Co-workers. She was continually active in her faithful ministry of prayer and Community spiritual events. Sister enjoyed Community activities and graciously extended hospitality to all.