Dr. Welsh was then commissioned as an Officer in the United States Air Force and moved to St. Louis, Missouri to complete an Advanced Education in General Dentistry residency at Scott Air Force Base where he was ranked number one in his class. During this time, Dr. Welsh received one-on-one training with dental specialists where he learned to complete advanced cases including removal of impacted wisdom teeth, IV sedation, root canals, and implants.
After his residency, Dr. Welsh spent another three years in the Air Force before deciding to separate from full-time active duty and return home to Tennessee. Dr. Welsh continues his military service part-time in the Tennessee Air National Guard.