He has been a picture editor and visual leader at National Geographic magazine, the White House and several of America’s leading newspapers. Davis was twice named newspaper picture editor of the year, and has edited the work of several photographers who went on to win Photographer of the Year titles. He has been a picture editor for more than 20 books and taught many workshops and judged scores of contests. Davis has been on the faculty of various workshops, including the Missouri Workshop, Mountain People’s workshop, Santa Fe Workshops, The Atlanta Photojournalism Seminar, Northern Short Course, New Zealand Photofest and Somos Foto in Ecuador and The Dominican Republic. Twice he's been a roving reviewer during Photolucida and he has lectured at a range of universities.