Systems Architecture / State Estimation EngineeringProvenance-tracked architecture, a real security vulnerability found and closed. Formal Methods / Mathematical VerificationFull checked proof chain, initial version through current. Adversarial / Security TestingA real vulnerability found by testing against the strongest competing approach. Software QA / Verification EngineeringDocumented self-audit discipline — real bugs caught and fixed, shown. Applied Statistics / Quantitative BacktestingReal-data NFL backtests, interactive strategy tools with real forward-walk validation. Educational Technology / Instructional DesignReal classroom results predating any software, seven years GED instruction. AI Systems Evaluation / LLM AuditingDocumented catches of fabricated figures and cross-document citation drift.