Since 2001, he has headed the environmental community's Judging the Environment project and website www.judgingtheenvironment.org, which works with other progressive groups on federal judicial selection and related issues such as access to court. During Glenn's previous time at Earthjustice, the National Wildlife Federation and law firms, he litigated dozens of major court cases. Glenn wrote chapters in four American Bar Association books and in two books that are "popular" in terms of content, if not necessarily sales, and has published numerous law review and other articles. He was graduated cum laude from Princeton University in 1976, and received a law degree in 1979 from the University of Virginia School of Law, where he served on the Virginia Law Review. Glenn lives in Virginia with his wife, daughter, and son.