Prior to his judicial appointment, Fallon was in private practice in New Orleans from 1962 to 1995, and was also an adjunct professor at Tulane University Law School from 1975 to 1993.

On March 31, 2010, Fallon found no reason to prevent the building project valued at $2 billion to move forward.

Fallon's ruling found that there were enough environmental impact studies completed before moving the project forward, a main objection by the National Trust for Historic Preservation.

Fallon is the author of several books and law review articles,[4] and has also received numerous awards in his legal career.

[4] In 2012, Judge Fallon received the Louisiana Bar Foundation Distinguished Jurist Award, and in 2013, was inducted into The National Trial Lawyers Hall of Fame.