Mark Petersen patrols the BLM public lands in Tuolumne, Calaveras and El Dorado counties for the Folsom Field Office. Mark knows this region of the Sierra Nevada Mountains, well. A native Californian, he was born in St. Helena, but moved to Sonora in Tuolumne County his junior year in high school. Mark started his government career in 1993 as a resource protection officer in the Stanislaus National Forest. He then worked back and forth as a National Park ranger between Glen Canyon National Recreation Area and Yosemite National Park from 1994 to 2000. He joined the Forest Service as a law enforcement officer in 2001 and worked in the Shasta-Trinity National Forest until 2005, then transferred to the Tahoe National Forest and worked there until 2007. He came to BLM in March 2007.
He received a bachelor's degree in psychology from California State University, Chico in 1988.
When not patrolling the public lands, Mark enjoys skiing, hiking and backpacking in the Sierras. He lives in Twane Harte, just up the road from Sonora, with his wife, Valerie, and three children.