Michael Allen was nominated by the President of the United States in June 2017. He was confirmed by the United States Senate, and appointed a Judge of the United States Court of Appeals for Veterans Claims in August 2017. United States District Judge Elizabeth Kovachevich of the Middle District of Florida administered the judicial oath to Judge Allen on August 11, 2017.
For 16 years before his judicial appointment, Judge Allen was a tenured full professor of law at Stetson University College of Law in Gulfport, Florida. He was also the director of Stetson's Veterans Law Institute, and he spent four years as the College of Law's associate dean. Judge Allen also served as a visiting professor of law at the University of Illinois College of Law. Before entering teaching, Judge Allen practiced law for nine years in the litigation department of the Boston-based international law firm Ropes & Gray.