Brian Massengill focuses his practice on the intersection of litigation with accounting and finance issues. He is the co-leader of the firm’s Professional Liability practice group.
Brian brings his background as a Certified Public Accountant, including eight years with a national accounting firm, to bear on his legal work. He devotes the majority of his practice to the defense of accounting firms and has represented national firms in a variety of matters including securities class actions, arbitrations, SEC and PCAOB investigations, and state accountancy board proceedings.
Brian’s combined legal and accounting experience also enables him to serve clients in a variety of other contexts. He has represented companies in disputes arising from purchases and sales of businesses, including purchase price (post-closing adjustment) disputes, and suits alleging breaches of representations and warranties. He also has represented companies in contract and other disputes involving complex causation and damages issues. As part of his litigation practice, Brian has worked extensively with experts in the areas of auditing, accounting, causation and damages.
Prior to joining Mayer Brown in 1996, he was Law Clerk to The Honorable Frank H. Easterbrook, US Court of Appeals for the Seventh Circuit.