Corporate investigators conduct internal and external investigations for corporations. In internal investigations, they may investigate drug use in the workplace, ensure that expense accounts are not abused, or determine whether employees are stealing merchandise or information. External investigations attempt to thwart criminal schemes from outside the corporation, such as fraudulent billing by a supplier.

Financial investigators may be hired to develop confidential financial profiles of individuals or companies that are prospective parties to large financial transactions. These investigators often are certified public accountants (CPAs) who work closely with investment bankers and other accountants. They might also search for assets in order to recover damages awarded by a court in fraud or theft cases.