$BHGI didn't hire just any accounting firm. BDO is the 5th largest in the WORLD! Serious stuff here folks! ABOUT BDO INTERNATIONAL BDO Castillo Miranda, established in 1943, is a member firm of BDO International , the world's fifth largest accounting network, with 1,328 offices in 152 countries. BDO had 2014 revenue of more than 7.02 billion dollars . They provide a strong presence in Mexico , professional auditing services, Tax Advisory,Financial Control (outsourcing),Risk Consulting,Corporate finance; Information Technology and Foreign Trade and Customs. BDO was founded in 1963 as a result of the merger of firms from the United Kingdom , Holland , Germany , United States and Canada .