It's not enough to possess knowledge - one must be certified. If you're a system auditor, there's no better certification than the CISA. It certifies that your knowledge meshes with the requirements of the ISACA. Information technology is a field that is always in flux, and with each advance in technology come related questions of business practice and ethics - and ultimately these become questions of law. A technology auditor must know not only the law, but the reasons for the…