DHA eMASS Practice Test 2026 – Complete Exam Prep Guide

The responsibility for uploading the Authorization to Operate (ATO) authorization package typically falls to the System Owner or the Information System Security Manager (ISSM) of the unit. This makes sense because the System Owner is directly involved with the system's management and security posture, ensuring that all necessary documentation is prepared according to established criteria and regulations.

The ATO package comprises crucial documentation, such as security controls, risk assessments, and compliance records that are necessary for the system to receive authorization from the appropriate authority. Because the System Owner or ISSM is most familiar with the operational and security requirements of the system, they are best positioned to ensure that all pertinent information is included and accurately reflects the system's security state.

While the Chief Information Officer and other parties may have roles in overseeing or managing information systems, they are not typically charged with the direct responsibility of compiling and uploading this specific package. Similarly, third-party security contractors might assist in developing and securing the system but do not hold the accountability for the governance aspects associated with ATO submission. Medical facility administrators are involved in managing healthcare settings and resources, but do not have direct oversight of information system security protocols and responsibilities.

Thus, the System Owner or Unit ISSM is the appropriate candidate for this task, as