Dr. Thomas Hallee is a locum tenens psychiatrist with a specialty in addiction medicine. He received his MD from the University of Vermont. He completed his residency in Honolulu, Hawaii, and served in the United States Air Force, stationed in Guam. Dr. Hallee practiced in Sydney, Australia; Bangor, Maine; Hawaii; Alaska; and in Landstuhl, Germany, before becoming a permanent locum tenens physician, working all over the United States, in 1997.

Dr. Hallee began running marathons in the 1980s, while living and working in Hawaii. In 2010, he achieved his personal goal of running the marathon in all 50 United States, set in Tuscon, Arizona, in 2002, and completed in Providence, Rhode Island, in 2010.