TSC scoping memo
Written scoping decision against the AICPA Trust Services Criteria 2017: which categories (Security mandatory; A1, C1, PI1, P1–P8 optional), which systems are in scope, which subservice organisations carve out, and what the report description of the system will say.
Control implementation
Actual engineering work: SSO+MFA on every system, SCIM provisioning, IaC-enforced encryption and backup, GitOps change management, centralised logging with retention, on-call rotation and incident postmortem template, vendor inventory and DPA tracking.
Policy pack
15+ policies cross-referenced to specific CC and chosen-category controls: information security, access control, change management, incident response, business continuity, vendor management, acceptable use, secure development, encryption, data classification, risk assessment, and HR security.
Automation platform integration
Vanta, Drata, Secureframe, Tugboat Logic or your incumbent — integrations tuned for low false-positive rate, evidence quality checked before the auditor sees it, and operator playbooks for the inevitable failed checks.
Auditor liaison
We run the relationship with your CPA firm: kickoff, evidence room, fieldwork questions, exception handling, management response drafting, and the negotiation around the wording of the report description and complementary user entity controls (CUECs).
Type II observation operations
For the 6–12 month observation window: monthly control owner sync, quarterly access and vendor reviews, evidence-quality monitoring, incident response on retainer, and the discipline that prevents a single control gap from killing your opinion.