About Sierra Club: The Sierra Club is the largest and oldest environmental organization in the country. Our mission is to practice and promote the responsible use of the earth's ecosystems and resources; educate and enlist humanity to protect and restore the quality of the natural and human environment; and, to use all lawful means to carry out these objectives. Sierra Club is comprised of a national entity and a network of local chapters that support our grassroots engagement. With 800+ staff, 64 chapters, 4,000 volunteer leaders and a reach to nearly 4 million people we're at the forefront of climate change activism. We are also proud to be a unionized employer - with two labor unions representing more than half of our employees. Sierra Employee Alliance, UAW Local