In our organization, DevSecOps is primarily a cultural shift reinforced by a structured methodology. The biggest change was making security a shared responsibility—developers, platform teams, and security engineers collaborate early on threat modeling, secure design choices, and risk acceptance instead of pushing security to the end. That culture is then operationalized through repeatable practices: security gates in CI/CD (SAST, dependency and container scanning, IaC checks), policy-as-code, secrets management, and continuous monitoring in production. Treating it mainly as culture ensures teams don’t “check the box” and move on; security becomes part of daily engineering decisions. Treating it also as methodology ensures consistency, auditability, and measurable outcomes like faster vulnerability remediation, fewer production incidents, and fewer late-stage security surprises.