Labor Secretary Hilda Solis is resigning from the Obama administration, the White House announced Wednesday.

In a statement, President Obama thanked Solis “for her steadfast commitment and service not only to the Administration, but on behalf of the American people.”

“Over the last four years, Secretary Solis has been a critical member of my economic team as we have worked to recover from the worst economic downturn since the Great Depression and strengthen the economy for the middle class,” Obama said. “Her efforts have helped train workers for the jobs of the future, protect workers’ health and safety and put millions of Americans back to work.”