The scope of the HACS SIN includes proactive and reactive cybersecurity services. Assessment services needed for systems categorized as High-Value Assets (HVA) are also within this SIN scope. It includes Risk and Vulnerability Assessments (RVA), Security Architecture Review (SAR), and Systems Security Engineering (SSE). Additionally, the scope of the SIN includes services for the seven-step Risk Management Framework (RMF) and Security Operations Center (SOC) services.