The advisory firm behind the administration of collapsed investment bank Lehman Brothers has bolstered its transaction services team in response to a “steady surge” in demand among buyout firms and corporate buyers.

Alvarez & Marsal has appointed New York-based Paul Aversano as global head of its transaction advisory group, according to a statement. The appointment of Aversano, an existing managing director at the firm who helped launch the transaction services division in 2006, follows Alvarez adding a UK-based team in 2009.