Careers in the National Park Service. The National Park Service offers many different employment opportunities. NPS/Kurt Moses. NPS careers. What comes to mind when you think about working for the National Park Service? Park rangers in flat hats in a beautiful landscape? Staff in period clothing interpreting our nation's history? Sure, we have lots of employees who do that, but in reality National Park Service employees wear a lot of different hats—or no hats at all! From budget and finance to scientific research to community assistance to maintenance to park rangering, employees fill a variety of roles as we work to preserve our nation's special places and stories.