He formerly worked as chancellor for the Archdiocese of Denver, special assistant to Bishop James D. Conley in the Diocese of Lincoln, Nebraska, and editor-in-chief of Catholic News Agency.

[3] In December 2020, Flynn and Condon announced their departure from Catholic News Agency, citing personal and family reasons, and launched The Pillar on January 4, 2021.

[7] Europe editor Luke Coppen, former editor of the Catholic Herald, publishes a subscriber-only newsletter called Starting Seven containing the daily Vatican Press Bulletin, upcoming news to watch out for, and summaries of Catholic news of the day, including links to stories not necessarily published by the Pillar.

[13] In July 2021, The Pillar published a story which reported on cell phone location data which showed that Monsignor Jeffrey Burrill, the top administrator of the United States Conference of Catholic Bishops, had frequented gay bars and the Grindr app.

[14] In a Religion News Service column appearing in The Washington Post, theology professor Steven P. Millies decried the investigation as "unethical, homophobic innuendo" and wrote that The Pillar "must not have thought about the Code of Canon Law" and "The Pillar's investigators paid little heed also to the canons of ethics for journalists".