David Lambertson was a Foreign Service Officer for 32 years, serving primarily in East and Southeast Asia. He retired in 1995, following four years as Ambassador to Thailand. Since then, Lambertson has been an adjunct faculty member at KU, Claremont-McKenna College in California, and the Command and General Staff College at Ft. Leavenworth. He was also a part-time representative of the Korean Peninsula Energy Development Organization in North Korea from 2000 to 2005.
Lambertson is a 1962 graduate of the University of Redlands (California) and the Royal College of Defence Studies in London.