Michael Brune (born 24 August 1971) became the youngest executive director of the Sierra Club at age 38.
[2] Prior to the Sierra Club, Brune was the executive director of the Rainforest Action Network for seven years.
[3] In 1999, while working at the Rainforest Action Network, Brune ran a successful campaign to get Home Depot stores to stop purchasing and selling wood from old-growth forests.
[6] In August 2021 the Sierra Club announced that Brune was resigning as executive director, effective as of the end of the year.
[9] Similarly, assertions made by Brune during his tenure at the Rainforest Action Network and Sierra Club[10] were eventually addressed and overturned in U.S. federal court in a case labeled as the "legal fraud of the century" by the Wall Street Journal.