DevSecOps is not a new invention – it is DevOps going back to its roots. Ten years after the initial DevOps movement, the same CALMS framework (Culture, Automation, Lean, Measurement, Sharing) that guided DevOps transformation maps directly onto integrating security. The belief in collaboration over specification, T-shaped people over full-stack unicorns, and shared responsibility over siloed ownership – all of that applies unchanged when you add security to the mix.
On the culture side, the “if you build it, you run it” mantra naturally extends to “you secure it.” That already implies three skill domains working together, which reinforces why collaboration between specialists and generalists matters more than ever. The lean aspect brings the business discussion into focus: security is not just a cost center but a strategic differentiator. The hardest conversation in any DevSecOps transformation is backlog alignment – balancing features, operational stability, and security investment.
Automation in DevSecOps follows the same continuous-everything pattern. We want repeatable builds, version-controlled artifacts, and discoverable inventories. The difference with security is that we cannot fully control the outside world – supply chain dependencies, open source libraries, cloud providers – all introduce risks beyond our pipeline. Standard changes should be automated; exceptions deserve human attention. This principle from change advisory boards translates directly to security governance.
Measurement brings its own challenges. Vulnerability counts are not the end metric – business dollars are. The Dunbar number applies to metrics too: how many do you really care about? Signal-to-noise ratio matters enormously when every scanner produces hundreds of findings. Blameless post-mortems, escape rates, and observability practices all transfer directly from the DevOps playbook.
The sharing pillar is where trust gets built. Competence builds trust, but it is not sufficient alone. Self-servicing security capabilities, feeding vulnerability data back into the IDE, providing paved roads – these are the mechanisms that turn security from a blocker into an enabler. DevSecOps is an evolution of DevOps maturity, not a replacement. Features, containers, and vulnerabilities come and go, but the people – developers, operators, and security practitioners – are here forever.
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