The NPS Chief Ranger communicated to the ProRangers his six key things to remember:
Body, Mind, Spirit, Education, Training, and Experience. Shackelton went on to identify the threats and challenges faced by the NPS and the ProRangers as the progress through their careers.
In addition to his eight years as Chief Ranger at Yosimite, Shackelton has served as superintendent of Pinnacles National Monument in California and in Washington, DC, in the NPS Office of Legislative and Congressional Affairs and the U.S. Senate as part of the NPS Bevinetto Fellowship.
He spent nine years in Alaska and five years in Hawaii in resource protection management positions. He began his NPS career at Grand Teton National Park in Wyoming as a ranger working in fire, search and rescue, emergency medicine, and law enforcement; and six summers as a firefighter on the Sierra National Forest in California.
Shackelton has bachelors and masters degrees in Criminology from California State University, Fresno, and a Masters of Public Administration from the University of Alaska, Anchorage. In 1990, he completed the FBI National Academy executive management program and served as a Congressional Fellow from 1997 through 1999. In 2005, he finished the federal Senior Executive Candidate Development Program – an 18-month program in the Department of the Interior, completing a detail assignment with the University of California and time at Harvard’s Kennedy School of Government and the Stanford Graduate School of Business, Executive Development Program.