Conducts system audits and ensures system compliance, especially regarding Security Technical Implementation Guides (STIGs). The ISSO is appointed by the Program Manager or the System Owner. 

Applicability: Relevant in cybersecurity roles, compliance audits, and system security.

URL: STIG Overview

Chairman of the Joint Chief of Staff Instruction (CJCSI) 8410.02

DoDI 8510.01 DoD RMF