Eggleston, a partner for the law firm of Kirkland & Ellis, has long experience in representing both businesses and individuals facing congressional and regulatory investigations.
He previously served in President Bill Clinton's White House as associate counsel to the president from 1993 to 1994. During that time he helped represent the president in the Whitewater hearings, as lawmakers probed the Clintons' real estate investments.
In a statement, President Obama praised Eggleston, saying that he would bring “extraordinary expertise, credentials, and experience, to our team.”
“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,” said Obama.
Ruemmler is leaving the White House counsel post after nearly three years to return to the private sector, according to reports.
"Kathy has become one of my most trusted advisers. I deeply value her smarts, her wit, her impeccable judgment – but most importantly her uncanny ability to see around the corners that nobody else in the room anticipates,” said Obama. “I will forever be grateful for her service to the country, will continue to seek her counsel, and most of all, I am proud to call her a close friend.”
Eggleston began his legal career as a clerk for Judge James Hunter III, and later for Supreme Court Chief Justice Warren Burger before working as a U.S. attorney in New York.
Eggleston also served as deputy chief counsel for the House committee investigating the Iran-Contra affair before joining the Clinton White House in 1993.
White House correspondent Susan Crabtree contributed.