Caballero has degrees in economics and business administration, and has worked for businesses in Spain and the United States in positions of international finance.
He has been married for 33 years to Immaculada, and they have two adult children.
When appointed to work in the Vatican’s economy office in 2020, Caballero described it as “God’s call,” saying that for he and his wife, “there was only one response: ‘fiat.’”
Pope Francis established the Secretariat for Economy in 2014 as part of his financial reform of the Vatican. It oversees the financial aspects of both the Roman Curia and the Vatican City State administration, including a review of financial reports.
Guerrero, who has been a Jesuit since 1979, has a degree in economics from the Autonomous University of Madrid and degrees in theology, philosophy, and letters.
Before becoming prefect, the priest had been living in Rome since 2017, serving as general counselor and delegate of the superior general for the interprovincial houses and works of the Jesuits.
Guerrero had filled a position left vacant since February 2019, when the Vatican confirmed Cardinal George Pell’s five-year term as prefect to have expired.
Pell had taken a leave of absence beginning in June 2017, when he returned to his country of Australia to defend himself at trial against charges of historic sex abuse.
The cardinal was initially convicted and imprisoned, but later had his conviction overturned on appeal. He was released and moved back to Rome, where he lives in retirement.
This story was updated at 7 a.m. MST with information from Vatican News about Guerrero's letter.
Hannah Brockhaus is Catholic News Agency's senior Rome correspondent. She grew up in Omaha, Nebraska, and has a degree in English from Truman State University in Missouri.