Irish American Ken Hackett, the retired president of Catholic Relief Services, has been confirmed as U.S. Ambassador to the Vatican.

"We are overjoyed that the country will be represented by a man who through his decades of service has demonstrated his commitment to the dignity and sanctity of life and fighting global poverty," said Carolyn Woo, current CRS president and chief executive officer, in a statement.

"We look forward to working with the new ambassador as he engages the Vatican and Pope Francis towards the common goal of advancing peace and justice in the world."

President Barack Obama named Hackett for the position on June 14, the same day he announced nominees for ambassador posts in Brazil, Spain, Germany, Denmark and Ethiopia.

"It gives me great confidence that such dedicated and capable individuals have agreed to join this administration to serve the American people. I look forward to working with them in the months and years to come," the president said.

Hackett retired in December 2011 after 18 years as president of CRS, the U.S. bishops' overseas relief and development agency.

As U.S. ambassador to the Vatican, he succeeds Miguel Diaz, who left the post in late 2012. Diaz now is a professor of faith and culture at the University of Dayton, Ohio.

Hackett was appointed president of CRS in 1993. During his tenure, he established a division focusing on outreach to dioceses, parishes, Catholic organizations, and colleges and universities, and laypeople were first appointed to the CRS board of directors.

Catholic Relief Services now operates in more than 100 countries, with a global staff of nearly 5,000.

Born in West Roxbury, Mass., Hackett joined the Peace Corps shortly after his 1968 graduation from Boston College. Assigned to a Catholic mission in rural Ghana, he worked in an agricultural cooperative and saw "the actual impact of American food aid on the health and well-being of very poor kids in a very isolated part of a West African country," he said recently.

After completing his Peace Corps assignment, Hackett joined CRS, the U.S. Catholic relief and development agency, in 1972. He started his career in Sierra Leone, where he managed a nationwide leprosy program and a maternal and child health program.

Subsequent positions took him to various posts in Africa and Asia, as well as in CRS' Baltimore headquarters. As regional director for Africa, he managed the agency's response to the Ethiopian famine of 1984-85. He also supervised CRS operations in East Africa during the crisis in Somalia in the 1990s.

In February 2012, Hackett and Diaz represented the U.S. government at the consistory led by Pope Benedict XVI in St. Peter's Basilica at the Vatican ceremony. Pope Benedict XVI created 22 new cardinals from 13 countries -- including two from the United States and one from Canada.

In May of that year, he received the University of Notre Dame's Laetare Medal during commencement ceremonies. The medal has been given annually since 1883 to a Catholic "whose genius has ennobled the arts and sciences, illustrated the ideals of the church and enriched the heritage of humanity."

In announcing that honor, Holy Cross Father John Jenkins, Notre Dame's university president, said in a statement: "Ken Hackett has responded to a Gospel imperative with his entire career. His direction of the Catholic Church's outreach to the hungry, thirsty, naked, sick and unsheltered of the world has blended administrative acumen with genuine compassion in a unique and exemplary way."