EP 30 — Postman's Sam Chehab on Three Unteachable Traits He Hires For
At Postman [https://www.postman.com/]'s scale of 40 million developers generating billions of API requests, Sam Chehab [https://www.linkedin.com/in/schehab/], Head of Security & IT, centers on three enforcement domains: authenticated and encrypted data paths, zero-trust inter-service communication, and runtime instrumentation. His vendor evaluation is just as precise, cutting past feature lists to one demand: show me the architecture diagram and walk through exactly how your solution addresses my threat models.
Sam identifies why generative AI creates fundamentally new risk: the combination of private data access, untrusted content processing, and external communication capability. This trifecta explains why browser-based AI is nearly impossible to contain; it touches local machines, queries the open web, and executes actions on your behalf. Sam also covers how he screens for three traits he can't train: initiative to self-direct research, attitude to absorb constant setbacks, and aptitude to process how rapidly this field moves.
Topics discussed:
* Implementing data path integrity, zero-trust inter-service authentication, and runtime instrumentation with immutable logs
* Evaluating cybersecurity vendors by demanding architecture diagrams and specific threat model solutions rather than feature lists
* Managing freemium platform security with anomaly detection, rate limiting, and abuse prevention across 40 million developers
* Identifying AI security's dangerous trifecta: private data access, untrusted content processing, and external communication capabilities
* Building MCP generators that enable least-privilege API servers by allowing developers to select only required methods before deployment
* Using AI agents to generate security tests during development, shifting validation from security teams to automated testing
* Applying security hygiene fundamentals before adopting specialized vendor solutions
* Hiring security teams based on three unteachable traits: initiative, attitude, and aptitude