Freddie Mac on Monday said Chief Executive Officer David Moffett is quitting just six months after being named to the post as the government forced the No. 2 mortgage finance company into conservatorship.

Before 1993, he worked at BankAmerica Corp. and Security Pacific Corp.

McLean, Virginia-based Freddie Mac also reiterated that it expects its regulator will ask the Treasury for $30 billion to $35 billion in capital after the company files its 2008 annual report with the Securities and Exchange Commission.

President Barack Obama last month outlined a home refinancing and foreclosure prevention plan that relies heavily on Freddie Mac and larger rival Fannie Mae . But the companies themselves are facing billions of dollars in losses and must rely on the government for support.

The Obama administration last month doubled its capital commitment to the companies to $400 billion.

James Lockhart, director of the Federal Housing Finance Agency, the companies' regulator, said he would work with Freddie Mac to ensure a smooth transition in leadership.

(Reporting by Al Yoon, Editing by Walker Simon)