When Tim Bitsberger started his new job at Freddie Macs headquarters in McLean, Virginia, it meant he would still be near his old base of Washington, DC. Before he became Freddie Macs new treasurer and senior vice-president of funding and investor relations in January, he was assistant secretary for financial markets at the US Treasury. In this role, he advised the undersecretary for domestic finance on such areas as federal debt management, state and local finance, financial market oversight, and regulation. Before this he worked on Wall Street for 15 years, most recently as senior vice-president of investments at Salomon Smith Barney between 1999 and 2001....