Pope Leo XIV has appointed Sr. Mary T. Barron, OLA, Congregational Leader of the Sisters of Our Lady of Apostles, Adjunct Secretary of the Dicastery for Evangelization, entrusting her with the presidency of the Pontifical Mission Societies. The appointment will take effect on 4 January 2027.

In accepting this new responsibility, Sr. Mary expressed profound gratitude to the Holy Father and trust in God's providence, highlighting the spirit of service that has guided her throughout her religious and missionary vocation.

“Throughout my life as a missionary and Religious sister, I have sought simply to respond to God's call wherever it has led me. This appointment was completely unexpected, and I accept it in the same spirit of service that has guided my vocation from the very beginning.”

As the first woman to hold this position, Sr. Mary recognises that her appointment carries a significance extending far beyond her personal experience: it is a recognition of the many women who, throughout history, have dedicated their lives to proclaiming the Gospel and serving communities.

“I see it as a recognition of the countless women, Religious and lay, who have dedicated their lives to proclaiming the Gospel and serving God's people in every corner of the world.”

The appointment also holds special significance for her Congregation, which this year celebrates 150 years of missionary service, particularly in Africa. Sr. Mary recalled with gratitude the generations of sisters who have gone before her, recognising in the charism and witness of her religious family the foundations of her own journey.

She also emphasised the value of missionary experience in this new ministry within the Church:

“Missionaries live close to the realities, hopes, and challenges of local churches, and I hope to bring that perspective to the service of the Pontifical Mission Societies.”

Recalling Ireland's rich missionary tradition, Sr. Mary also paid tribute to those who have contributed to the growth of local Churches through evangelisation, education, healthcare and service to communities.

UISG Extends Its Congratulations and Best Wishes

The International Union of Superiors General (UISG) welcomes this appointment with joy and extends its warmest congratulations and best wishes to Sr. Mary T. Barron as she prepares to undertake this new ministry.

Her missionary experience, leadership and witness to consecrated life are a precious gift to the universal Church.

UISG accompanies Sr. Mary in prayer, asking that the Holy Spirit guide her in this new mission and that her service may help strengthen communion, collaboration and missionary solidarity among Churches throughout the world.

Official Appointment – Holy See Bulletin