Jacinta was born in Dublin, Ireland in 1960 and was consecrated to God in 1979. She studied psychology at University College Dublin and received her degree in 1981. As a Consecrated Woman, she did her formation in Rome and began her apostolic work in the United States. Subsequently, she directed schools in Mexico City, Mexico; Vienna, Austria; and Seville, Spain. Jacinta was territorial director of the Consecrated Women of Regnum Christi in the territory of Central and Western Europe from 2014 to 2020, when she was elected as general councilor and moved to Rome.