DevSecOps: Foundations & Transformation
Shift-Left Culture, TDMM Maturity Model, and the DORA Security Extensions
Most DevSecOps initiatives fail not because of tooling, but because they treat security as a configuration problem when it's actually a systems problem. This volume gives you the architectural thinking, the organizational playbook, and the measurement framework to build security into your delivery culture — permanently.
You'll work through the Techstream DevSecOps Maturity Model (TDMM), a five-domain, five-level framework that maps your current state and provides concrete upgrade paths across Governance, Engineering, Operations, Threat Intelligence, and Compliance. Unlike generic maturity models, TDMM is scored against real delivery metrics: DORA's four key metrics extended with security-specific dimensions (MTTR-S, Change Failure Rate with CVE attribution, Deployment Frequency gated by policy).
The culture section is blunt: you'll learn why security champions programs fail, what the data says about psychological safety and vulnerability reporting rates, and how to restructure incentive systems so engineering teams genuinely own security rather than tolerating it. Includes the full Security Champions Program blueprint, a 12-week onboarding curriculum, and the metrics to know if it's working.
Four concrete capabilities you will have
Run a full TDMM maturity assessment and generate a prioritized remediation roadmap for your organization
Implement DORA security extensions — measure MTTR-S and Change Failure Rate with CVE attribution alongside deployment frequency
Build a Security Champions Program that sustains itself: selection criteria, training curriculum, incentive structure, and the retention playbook
Apply the Shift-Left Cost Curve model to build a business case that CFOs actually approve
The idea behind Volume I
4 parts · 16 chapters
Part I — The Systems Problem
Why security-as-checkpoint fails, the cognitive load model behind shift-left, and how to diagnose your organization's current failure mode. Includes the Security Debt Ledger framework for quantifying accumulated risk in dollar terms.
Part II — The Techstream DevSecOps Maturity Model
Full TDMM specification: five domains (Governance, Engineering, Operations, Threat Intelligence, Compliance), five levels, and the scoring rubric. Assessment templates, domain-specific upgrade paths, and the TDMM Dashboard implementation guide.
Part III — Metrics that Move Organizations
DORA Four + Security Extensions implementation guide. Includes MTTR-S calculation methodology, CVE attribution to deployment events, and building the Vulnerability Lead Time metric. Chapter on using security metrics to get executive buy-in.
Part IV — Culture Engineering
The Security Champions Program blueprint, psychological safety and security reporting correlation data, threat modeling as a team sport (STRIDE-per-sprint methodology), and the change management playbook for organizations at TDMM Level 1-2.
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