Townsend will be joining the private sector.
WASHINGTON (CNN) - President Bush's top adviser on homeland security is stepping down after 4½ years on the job, the White House said Monday.
Homeland Security Adviser Fran Townsend turned in her letter of resignation to President Bush on November 6 and will be looking for new opportunities outside government.
"I'm going to just take another job doing 20-hour days, but this time in the private sector," said Townsend, who has spent 25 years working in law enforcement and government.
Bush praised Townsend's work Monday.
"Fran has always provided wise counsel on how to best protect the American people from the threat of terrorism," Bush said in a statement. "We are safer today because of her leadership."