Which of the following C&A professionals plays the role of an advisor? Response:

An Information System Security Engineer (ISSE) plays a crucial advisory role by applying their deep technical knowledge to design, develop, and implement secure information systems throughout their lifecycle. The ISSE ensures that security requirements are effectively integrated into system architectures and operations, offering expert guidance to various stakeholders involved in the C&A process. They translate security policies into practical technical solutions, thereby advising on the most effective ways to secure an information system.

The Chief Information Officer (CIO) is a senior executive responsible for IT strategy and operations, not typically an advisor on individual C&A technical implementations.

The Authorizing Official (AO) holds the ultimate responsibility for authorizing a system to operate, a decision-making role rather than an advisory one.

An Information Owner is responsible for the data's classification and access, not primarily for advising on system security engineering or C&A processes.