Joe Feller teaches Water Law, Natural Resources Law and Property. Since joining the College in 1987, Professor Feller also has taught Civil Procedure, Western River Management: Law & Science, Western Forest and Range Management: Law & Science, and the Civil Practice Clinic. Each spring, he leads law students on a field seminar to national forests, national parks and monuments, and other public lands in Northern Arizona to expose them to some of the people, places and issues involved in the implementation of natural resource laws. Professor Feller is on leave for the 2008-09 academic year, serving as senior counsel to the National Wildlife Federation in its Rocky Mountain Natural Resource Center in Boulder, Colo.

Professor Feller’s writings have appeared in numerous legal and scientific journals, and he is an author of the American Bar Association's NEPA Litigation Guide. He is a leading advocate for reform of livestock grazing on public lands in the western United States, and has represented environmental interests in litigation before administrative boards, federal district courts and courts of appeal, and the U.S. Supreme Court.

Professor Feller is an avid runner, hiker, photographer and cross-country skier, and he served as a coach for the Brazilian national cross-country ski team in 2008.