A Bismarck native, Dr. Keith graduated from Century High School in 2001. He went on to earn a B.S. degree, in Business Administration and Chemistry, from the University of Mary in 2005, where he was a 4-year member of the mens tennis team. Following completion of his undergraduate studies, Dr. Keith attended the University of Colorado School of Dental Medicine, earning a Doctor of Dental Surgery (D.D.S) degree. From that point, he attended orthodontic residency at Seton Hill University in Greensburg, PA, earning a Masters of Science (M.S.) in Orthodontics. Upon completion of his residency in 2012, Dr. Keith returned to Bismarck to begin practicing as an associate orthodontist. In 2017, he embarked on his own to build DK Orthodontics.

When not practicing orthodontics, Dr. Keith enjoys spending time with his wife, Jenna, and their daughters, Brynnlee and Indiana, traveling, and playing sports with his kids. He is very involved at both the state and national orthodontic level as he serves as President of the North Dakota Society of Orthodontists and also holds multiple leadership roles within the national orthodontic association.

Dr. Keith also holds the special distinction of being Board Certified by the American Board of Orthodontists (ABO). This is a title held by only 55% of orthodontists which denotes that Dr. Keith has successfully passed all levels of examination by the ABO.