Anti-corruption enforcement is bulking up. Already the acknowledged leader in global enforcement, the Department of Justice unit that prosecutes Foreign Corrupt Practices Act cases will soon grow “substantially,” according to the lawyer who runs it.

Mark Mendelsohn, deputy chief of the fraud section’s criminal division, said his section “may grow as much as 50 percent in size in the next year or two.” At the same time, he added, he expects companies to play an increasingly aggressive role in thwarting corruption.