Lazard, the investment bank and asset management firm with $1.6 billion in 2008 revenues, said Matthieu Bucaille will become its CFO in April 2011. He succeeds Michael Castellano, who is retiring in March 2011. Bucaille, 50, most recently deputy CEO of Lazard Fr?res Banque in Paris, will transfer to New York to prepare for his new position. He joined Lazard in 1989 and was made partner in 1998.

Ellen Rizzo was named CFO for the property and casualty business of Hanover Insurance Group, a $2.8 billion insurer in Worcester, Mass. She succeeds Joseph Freitas, who was named vice president of growth state management. Rizzo, 53, is joining Hanover from Travelers Cos., where she had served as CFO and senior vice president of business insurance since 1999.

Clarcor, a $907 million maker of filtration products, appointed David Fallon CFO. He succeeds Bruce Klein, who is retiring in June. Fallon, 40, has served as Franklin, Tenn.-based Clarcor's vice president of finance for the last year. Earlier, he was CFO at Noble International.