Raised by devout Catholic parents in Albuquerque, New Mexico, Sister Mary Jo Grethel realized as a child that she wanted to devote her life to God, she just wasn’t sure how. The answer came when she was in the 8th grade, after a close friend confided that she wanted to become a missionary. Almost instantly, Sister Mary Jo realized that she wanted to do the same.
Entering the Medical Mission Sisters in 1962 she earned a bachelor’s degree in nursing, then began her first overseas assignment in Afghanistan, where she served as a nurse-supervisor and then as a program director in a new government nursing school.
Sister Mary Jo reflects, “That was exciting. It was my first mission abroad. My experience was fantastic. I will always hold it dear to my heart.”
After leaving Afghanistan in 1974, Sister began vocation work in Philadelphia. She later served 15 years in Ghana, first at a retreat center and later training catechists, after which she became MMS Vocation Director and served at the national level as Executive Secretary. In 1998, Sister Mary Jo went to Kampala, Uganda, where she would stay until 2017. There she was active in vocation ministry for seven years, taught nursing ethics and was involved with the Christian Caring Community that had an informal school for HIV/AIDS orphans. Today, Sister Mary Jo serves as Integration/Formation Coordinator for Unit North America.