"Neil brings extraordinary expertise, credentials, and experience, to our team," Obama said in a statement. "He has a passion for public service, is renowned for his conscientiousness and foresight, and I look forward to working closely with him in the coming years."
Eggleston worked as a White House lawyer under Clinton, handling politically explosive issues like the Whitewater controversy, and later represented the former president during the investigation into the Monica Lewinsky affair.
He also represented Chicago Mayor Rahm Emanuel, then the White House chief of staff, during the prosecution of former Illinois Gov. Rod Blagojevich (D), who was convicted of attempting to solicit bribes for appointment to Obama's Senate seat.
Eggleston will have large shoes to fill in the West Wing, where Ruemmler has played a central role in a series of administrative policy initiatives and controversies.