President Donald Trump’s first two weeks in office sent shock waves through the National Park Service, a 20,000-strong agency of park rangers and desk jockeys who oversee some of the nation’s most beloved lands.

The National Park Service rescinded roughly 400 job offers for seasonal positions, prompting concerns that parks could be short-staffed during the summer.

A Trump administration hiring freeze is turning many experienced National Park, Forest Service and Bureau of Land Management seasonal workers to other industries.