Sally Jewell was sworn in as the 51st Secretary of the Interior on Friday, and spent her first full day on the job on Monday.

Secretary Jewell was sworn in and administered the oath of office by retired Justice Sandra Day O’Conner at the Supreme Court Friday.

The new Secretary now heads the Department of Interior and its more than 70,000 employees. She spent most of the day meeting some of those employees in her office.

Jewell made brief remarks as she entered the Interior building on Monday, underscoring her commitment to public service.

“There is no higher calling than public service, and I am honored and humbled to be serving as your Secretary of the Interior,” Jewell said. “At Interior, we have vast responsibilities to the American people, from making smart decisions about the natural resources with which we have been blessed, to honoring our word to American Indians and Alaska Natives.”

“Our public lands are huge economic engines for the nation,” added Jewell. “From energy development to tourism and outdoor recreation, our lands and waters power our economy and create jobs. I look forward to working with you all to ensure that we are managing our public lands wisely and sustainably so that their multiple uses are available for the generations to come.”

As Secretary of the Interior, Jewell and the Department of Interior serves as steward for approximately 20 percent of the nation’s lands, including national parks, national wildlife refuges, and other public lands; oversees the responsible development of conventional and renewable energy supplies on public lands and waters; is the largest supplier and manager of water in the 17 Western states; and upholds trust responsibilities to the 566 federally recognized American Indian tribes and Alaska Natives.