Reid Peyton Chambers served from 1973 to 1976 as Associate Solicitor for Indian Affairs of the U.S. Department of the Interior, the Department's chief legal officer with responsibility over Indian and Alaska Native matters. Since joining the firm in 1976, Mr. Chambers has represented tribes or other Alaska Native interests in litigation involving land, timber and water rights, hunting and fishing rights, reservation disestablishment, Alaska tribal rights and immunities, gaming law, tribal jurisdiction and taxation, oil and gas rights, and coal development. Mr. Chambers has codified tribal laws, advised Native American corporations on government procurement, and engaged in legislative advocacy on behalf of a variety of tribal interests. In 2003 Mr. Chambers represented the Bishop Paiute Tribe before the U.S. Supreme Court in Inyo County v. Paiute-Shoshone Indians of the Bishop Cmty., 538 U.S.701 (2003).

For over twenty years Mr. Chambers has taught a seminar on federal Indian law at Georgetown Law School. He has also taught the seminar several times at Yale Law School. In 1988, he served as the Chapman Distinguished Visiting Professor at Tulsa University Law School. Mr. Chambers is a co-author of the 1982 revised edition of Cohen's landmark treatise on federal Indian law and has published two oft-cited articles in the Stanford Law Review on federal Indian law issues, as well as a number of articles on Indian water rights.

Mr. Chambers taught law for three years as a professor at the University of California at Los Angeles (UCLA), worked extensively with the Native American Rights Fund, and for three years practiced privately in Washington, D.C. at Arnold & Porter. He received his undergraduate degree from Amherst College in 1962 and received his law degree from Harvard Law School in 1967, where he was a member of the Board of Editors of the Harvard Law Review. He also holds a graduate degree in Economics from Balliol College, Oxford.