Dr. Nally is a Board Certified Family Practitioner and Bariatrician (Obesity Medicine Specialist) in private practice in Surprise, Arizona, with special focus on diabetes, cholesterol, hypertension and weight management. He is the current President of Arizona Primary Care (APC) Physicians and the owner of Nally Family Practice, a division of APC.

He is currently the Past-President and member of the Executive Committee for the Arizona Osteopathic Medical Association. He is also a recognized Health Policy Fellow through the American Osteopathic Association.

He serves as an Adjunct Professor, for both A.T. Still University and Midwestern University medical schools.