Warren Hill spent more than two decades working at the Lake Clark National Park and Preserve, which spans 4 million acres of coastline, forests, lakes and glaciers in Alaska. Last summer, he was promoted to serve as maintenance supervisor,

The Centers for Disease Control and Prevention (CDC) is set to lose nearly 1,300 probationary employees—about 10% of its workforce—as part of a broader federal decision to remove all probationary employees from the agency.