Evidence before confidence
Assertions are labeled as assertions. Unknowns remain visible. A polished diagram does not make a claim true.
The reviewer
Independent judgment, signed by a named professional.
LeftOut Security has one clear accountability boundary: AI can assist the evidence work, but it does not issue the assessment.
TS
Tom Schreier, CISSP
Founder and Principal Security Reviewer with more than 15 years across security operations, cloud security, vulnerability management, enterprise architecture, and NIST-aligned governance.
Tom now focuses that experience on a problem many traditional reviews underweight: how AI systems inherit authority, consume untrusted instructions, cross trust boundaries, and create business exposure through the tools and workflows around the model.
CISSP
15+ years cybersecurity
Security architecture
Cloud security
Vulnerability management
Security operations
NIST-aligned governance
Federal + regulated environments
Why LeftOut exists
The failure is rarely the thing everyone was staring at. It is the thing left out of scope.
The application team sees features. The model team sees evaluations. The cloud team sees infrastructure. The governance team sees policy. The buyer sees a questionnaire.
LeftOut Security follows what those views left out: identity, data, delegated authority, retrieval, tools, approvals, external actions, and the evidence needed to defend a decision.
Working principles
Useful to the people who decide and the people who ship.
Business impact before theater
Technical conditions are tied to decisions, exposure, customer trust, and accountable owners—not fear value.
Independence before expansion
The assessment does not become a sales funnel for implementation work. Your team or chosen partner owns the fix.
Human accountability
Every final conclusion is reviewed and signed by Tom.
AI may help organize evidence, surface inconsistencies, test reasoning, and accelerate document production. It does not determine the final finding, risk decision, or professional conclusion.
No borrowed authority
Experience is context, not endorsement.
Professional experience and framework familiarity inform the review. LeftOut Security does not imply endorsement by an employer, government agency, standards body, model provider, or technology vendor.
Work together
Need a defensible decision about an AI system with real authority?
Start with a short, non-sensitive overview. If the assessment is a fit, the next step is a focused consultation and written scope.
Request a Consultation