Assured Guaranty, a provider of financial guaranty insurance, has appointed Robert Mills, who is currently CFO as its new COO and Robert Bailenson, currently chief accounting officer, will succeed Mills as CFO, effective 1 June 2011.

Mills joined Assured Guaranty in January 2004 from UBS where he was managing director, chief financial officer and operating officer of UBS for the Americas Region and a member of the board of directors of the UBS Investment Bank.

He joined UBS in 1994 as CFO of the Union Bank of Switzerland prior to its merger with Swiss Bank Corp. in 1998.

He was previously with KPMG Peat Marwick for 23 years as a partner and the national practice director for Investment Banking and Capital Markets.

Bailenson has been managing director and chief accounting officer of Assured Guaranty since May 2005 and has held a number of previous positions with Assured Guaranty and its predecessor companies since 1990.

Among these were chief accounting officer of Assured Guaranty Corp. and chief financial officer and Treasurer of Assured Guaranty Re. Prior to joining Assured Guaranty, Bailenson was with Ernst & Young.