Patton Boggs is facing a breach of contract lawsuit filed Tuesday by a former client that has accused the firm of marketing a competitor’s products when it was supposed to be marketing the client for potential business with the federal government.

MB Industries LLC, or MBI, a Louisiana-based company that builds blast-resistant buildings, hired Patton Boggs in December 2008 to help the company “become a major player” with agencies within the U.S. Department of Defense and U.S. Department of Homeland Security, and to otherwise expand its business, according to the complaint (PDF) filed in U.S. District Court for the District of Columbia.