[2] Anderson is the vice president of the Washington session of the Pontifical John Paul II Institute for Studies on Marriage and Family.

As Supreme Knight, Anderson was the chief executive officer and chairman of the board of the world’s largest Catholic family fraternal service organization, which has more than 1.9 million members.

This effort culminated in a 278-page report released in March 2016, which prompted then-Secretary of State John Kerry to declare that atrocities committed by ISIS against Yezidis, Christians, Shiite Muslims, and other minorities constituted genocide.

In addition to facilitating this legislation, the Knights donated more than $20 million in support of religious minorities in the Middle East between 2014 and 2018.

[8] In 2020, they committed $1 million in response to COVID-19, primarily in donations to food banks, as well as encouraging extra volunteer work.

Anderson became the founding vice president and first dean of the Washington, D.C., session of the Pontifical John Paul II Institute for Studies in Marriage and Family in 1988.

In 2009, Pope Benedict appointed Anderson to a five-year term on the board of supervisors of the Institute for Works of Religion, also known as the Vatican Bank.

[17] In 1994, he was a member of the Vatican delegation for the Fifteenth Meeting of the International Catholic Jewish Liaison Committee held in Jerusalem.