Which role compiles the required documentation for ATO authorization?

The role associated with compiling the required documentation for Authorization to Operate (ATO) is indeed the Information Assurance Officer. This position is crucial because it focuses on ensuring that all necessary security documentation is in place and meets the standards required for authorization. The Information Assurance Officer is responsible for gathering and consolidating the various assessments, security plans, policies, and procedures pertaining to the system's security posture.

This individual often collaborates with other stakeholders to ensure that the documentation is accurate and comprehensive, which is necessary for the ATO process. The foundational duty of the Information Assurance Officer is to ascertain that the system complies with applicable security controls and guidelines, and that all necessary documents are prepared for review to receive ATO approval.

In contrast, while the other roles listed may have related responsibilities, they do not typically focus on compiling ATO documentation to the extent that the Information Assurance Officer does. The Validator's role primarily involves reviewing and validating the security controls and assessments, the System Manager oversees the day-to-day operations and maintenance of the system, and the Chief Information Officer generally focuses on broader IT strategy and governance rather than the specific details needed for ATO documentation.