WASHINGTON — A top White House official who has been with President Barack Obama since he first became a U.S. senator nine years ago is resigning.
Alyssa Mastromonaco, 38, is Obama's deputy chief of staff for operations and is often described as the most influential person inside the White House who isn't well known outside of it.
She is responsible for planning presidential events, hiring staff and overseeing the White House complex. She is leaving in May to look for a job in the private sector, an official said Saturday.
Mastromonaco joined Obama's Senate office in February 2005 as scheduling director, and oversaw scheduling and advance for his 2008 presidential campaign and during Obama's first term in the White House. She was promoted to deputy chief of staff in 2011.
She is one of several of Obama's most trusted longtime advisers to leave as he enters his sixth year in office. It's a familiar pattern for second-term presidents, as aides grow tired.