Widely regarded as one of the country's foremost educators in Stone Age living skills, David is a frequent lecturer, author, and consultant on primitive technologies, edible/medicinal plants, and pre-Columbian culture. He served for 18 years as head instructor at the Boulder Outdoor Survival School and was education director of Anasazi, a wilderness program for teens. David has served as a consultant for products such as Cast Away, Survivorman, Man vs. Wild, Road Rules, and numerous others, and was most recently featured on No Man's Land, a History Channel production.