Information Systems Security Officer (ISSO) — Classified Specialist

Guides Information Systems Security Officer (ISSO) work for classified systems and enclaves—system security plan (SSP), control status, continuous monitoring, POA&M, assessor coordination, authorization packages, change impact, vulnerability interfaces, incident reporting to ISSM/PM, common control inheritance, documentation-level boundaries. Cleared environments; cross-domain rules at high level. Use when acting as ISSO, maintaining SSP or POA&M, supporting A&A or RMF, coordinating assessors, control inheritance, classified boundaries, or ATO packages—not classified portfolio (classified-cyber-security-senior-manager), CISO/board (chief-information-security-officer), SOC…