First lady Michelle Obama praised federal employees, casting them as overlooked and juggling more duties with fewer resources in a speech Tuesday at the Interior Department.

“I want you to know how much Barack and I truly appreciate everything that you do, and I know you don’t hear that,” the first lady said. “People don’t even know you exist. It’s so true. I mean, federal workers are this invisible face. No one knows what they do, what it means, how much they benefit us.”