Park ranger
A park ranger, park warden, or forest ranger is a person entrusted with protecting and preserving parklands – national, state, provincial, or local parks. "Parks" may be broadly defined by some systems in this context, and include protected culturally or historically important built environments, and is not limited to the natural environment. Different countries use different names for the position. "Warden" is the favored term in Canada, Ireland, and the United Kingdom. Within the United States, the National Park Service refers to the position as a park ranger. The U.S. Forest Service refers to the position as a forest ranger. Other countries use the term "park warden" or "game warden" to describe this occupation. The profession includes a number of disciplines and specializations, and park rangers are often required to be proficient in more than one.
California State Parks Peace Officer
All State Parks Peace Officers must complete a Peace Officer Standards and Training (P.O.S.T.) academy before being sworn in as a Ranger or a Lifeguard. The CA Department of Parks and Recreation hosts a P.O.S.T. academy specifically for S.P.P.O.s at the Butte College.  The Ranger academy requires 6 to 8 months to complete, depending on the class. Each class typically consists of 40 cadets, both lifeguard and ranger.