On April 11, 2014, President Obama formally nominated Sylvia Mathews Burwell to replace Kathleen Sebelius as Secretary of Health and Human Services (HHS). Burwell currently is the Director of the Office of Management and Budget (OMB). Previously, she served as President of the Walmart Foundation, President of the Global Development Program at the Bill & Melinda Gates Foundation, and in several roles during the Clinton Administration, including Deputy Director of OMB, Deputy Chief of Staff to the President, Chief of Staff to the Secretary of the Treasury, and Staff Director of the National Economic Council.