The 7 Phases of DevSecOps — A Practical Guide
Plan, Code, Build, Test, Release, Deploy, Operate. Each phase explained: what it does, which tools live there, how long it takes to implement, and the ROI sequence for the team that's adopting DevSecOps for the first time.
Written by Proeffico's cloud + security practice. We've rolled out DevSecOps for BFSI, healthcare, manufacturing and SaaS clients across India and the GCC, so the order below is the order we actually use — not the order you'll see on a slide deck.
TL;DR — the 7-phase cycle
Phase 1
Plan
Phase 2
Code
Phase 3
Build
Phase 4
Test
Phase 5
Release
Phase 6
Deploy
Phase 7
Operate + Monitor
Security in each phase, not as a separate gate. Monitor runs continuously across all 7. The phases mirror the standard SDLC; what makes it DevSecOps is the tooling and culture at every stage.
The 7 phases, one by one
Phase 1
Plan
Threat-model the feature and define security acceptance criteria.
Every feature gets a security note in its design doc: data classification, threat model (STRIDE / LINDDUN if you're rigorous, OWASP Top 10 if you're starting), abuse cases, security acceptance criteria. The output is a security spec that travels with the feature spec — your Jira ticket already knows what 'done' means from a security standpoint.
Tools commonly used: Threat Dragon · Microsoft Threat Modeling Tool · OWASP Threat Modeling Cookbook · STRIDE / LINDDUN
How Proeffico engages: Architecture reviews; threat-modeling workshops at sprint kickoff for high-risk features.
Phase 2
Code
IDE security plugins, secure-by-default templates, peer review.
Catch the obvious stuff before it leaves the developer's machine. IDE plugins highlight insecure patterns (hardcoded secrets, SQL string concatenation, weak crypto) in real time. Service templates ship with secure defaults — TLS 1.3, parameterised queries, deny-by-default authz. PR templates include a security checklist. Peer review is a security gate, not just a quality one.
Tools commonly used: GitHub Copilot security review · SonarLint · Snyk Code · Semgrep Pro · ESLint security plugins
How Proeffico engages: Service-template hardening; peer-review checklists embedded in your delivery process.
Phase 3
Build
SAST + dependency scanning (SCA) + secrets-detection on every PR.
Three scanners on every pull request: SAST analyses the source for vulnerabilities (Snyk Code, Semgrep, SonarQube), SCA checks third-party dependencies against CVE databases (Snyk Open Source, GitHub Dependabot, OWASP Dependency-Check), secrets-detection blocks API keys and tokens from being committed (GitGuardian, git-secrets, truffleHog). Findings appear as PR comments, not separate dashboards — developers fix in the same review they wrote.
Tools commonly used: Snyk · SonarQube · Semgrep · GitHub Advanced Security · GitGuardian · truffleHog · OWASP Dependency-Check
How Proeffico engages: Pipeline integration; severity policy + exception workflow; SARIF aggregation into one dashboard.
Phase 4
Test
DAST, IAST, fuzzing, security regression suite.
Where SAST reads the source, DAST (dynamic) probes the running application. IAST sits in between — instrumented runtime that observes execution paths. Fuzzing hits inputs with malformed data to find crashes. Every shipped CVE-fix gets a regression test so the same hole doesn't reopen. Security tests run in the same pipeline as functional tests, not a separate cycle.
Tools commonly used: OWASP ZAP · Burp Suite Pro · Contrast Security · Veracode · GitLab DAST · Atheris (Python fuzz) · libFuzzer
How Proeffico engages: DAST/IAST orchestration; regression-suite curation; security-test runtime budget management.
Phase 5
Release
Artifact signing, SBOM generation, image scanning.
Every artifact you ship needs three things: a cryptographic signature so its origin is auditable (Sigstore / Cosign), an SBOM (Software Bill of Materials) so you can answer 'are we exposed to log4shell?' in seconds, and a vulnerability scan of the final container image (Trivy, Clair, Aqua). Image-signing policies enforce that only signed images deploy. SBOMs travel with the artifact into your registry.
Tools commonly used: Sigstore Cosign · Syft · Trivy · Clair · Aqua · Anchore · Grype · CycloneDX / SPDX SBOM formats
How Proeffico engages: Signing infrastructure setup; SBOM pipeline; vulnerability-policy automation per environment.
Phase 6
Deploy
IaC scanning, policy-as-code gates, blue-green or canary.
Infrastructure-as-code gets scanned the same way application code does — Checkov, tfsec, Snyk IaC catch misconfigurations (publicly-readable S3 buckets, overly-permissive IAM, missing encryption) before terraform apply runs. Policy-as-code (OPA, Kyverno) enforces 'no privileged containers in prod' as a deploy-time gate, not a documented rule. Blue-green or canary rollouts mean security regressions get caught in 10% traffic before they hit 100%.
Tools commonly used: Checkov · tfsec · Snyk IaC · OPA · Kyverno · Argo Rollouts · Flagger · ArgoCD with sync waves
How Proeffico engages: IaC pipeline build; policy-as-code authoring; progressive-delivery rollout strategy.
Phase 7
Operate + Monitor
Runtime protection, continuous compliance, incident response.
Production is the final phase, not a separate concern. Runtime protection (Falco, AWS GuardDuty, Defender for Cloud) detects anomalous behaviour. Continuous compliance scans verify CIS / SOC 2 / ISO 27001 controls daily, not at audit time. Centralised logging (ELK, Splunk, Loki) feeds the SIEM. SOAR playbooks automate the obvious incident-response steps. Postmortems feed back into the Plan phase — security incidents update the threat model.
Tools commonly used: Falco · AWS GuardDuty · Microsoft Defender for Cloud · CrowdStrike · ELK / Splunk / Loki · Wazuh · Prisma Cloud
How Proeffico engages: 24×6 on-call SRE coverage; SIEM tuning; incident-response playbook authoring + tabletop exercises.
Why DevSecOps moves the numbers
Industry data from organisations that rolled out the full phase set vs. those who treated security as a separate, post-release gate.
60-80%
fewer post-release security incidents
Sonatype 2024 DevSecOps survey
10×
faster vulnerability remediation
Snyk State of Open Source Security 2024
$3.5M+
average breach cost avoided per incident
IBM Cost of a Data Breach 2024
2-4×
faster regulatory audit clearance
ISACA State of Cybersecurity 2024
The ROI-ordered rollout sequence
If you're starting from zero, this is the order we recommend. Each step catches the cheapest-to-fix issues first.
Build (SAST + SCA + secrets-detection in CI) — covers 60-70% of issues, 3-week rollout, zero process change for developers.
Deploy (IaC scanning — Checkov, tfsec) — catches the next 15% of issues that arrive through infrastructure misconfiguration.
Test (DAST in nightly CI) — catches issues that only manifest at runtime; adds a regression suite for past CVEs.
Release (image scanning + signing + SBOM) — closes the supply-chain attack surface; needed for ISO 27001 / SOC 2 audits.
Operate (runtime protection + SIEM) — production becomes a sensor, not a black box.
Plan (threat modeling) — once tooling is mature, push security upstream into design.
Code (IDE plugins + templates) — the last and quietest phase to roll out; works best after culture has shifted.
Frequently asked
What are the 7 phases of DevSecOps?
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Plan, Code, Build, Test, Release, Deploy, Operate (with Monitor running through every phase). It mirrors the standard SDLC, with security gates and tooling added to each phase rather than as a separate cycle. The point is that security is a property of every commit, not a sign-off before release.
How is DevSecOps different from DevOps?
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DevOps optimises for delivery velocity. DevSecOps adds security as a continuous concern: SAST/SCA/secrets-detection on every PR, security findings in the same issue tracker as functional bugs, runtime-security telemetry on the same dashboard as performance metrics. The phases are the same; the guard-rails are at every phase, not just before release.
Which DevSecOps phase should I tackle first?
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If you have nothing in place: start with Build (SAST + SCA + secrets-detection in CI). It catches 60-70% of issues at the cheapest possible fix cost. Then Deploy (IaC scanning). Then expand to Plan (threat modeling) for new features and Operate (runtime protection). Skip nothing — but sequence by ROI.
How long does it take to roll out DevSecOps across a team?
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Tooling integration: 3-6 weeks for the first three phases (Code, Build, Test). Cultural adoption — security becoming part of the delivery conversation, not a separate ticket queue — typically 3-6 months. Mature operation with policy-as-code, automated compliance, and security SLOs owned by the on-call rotation: 12-18 months for most organisations.
What's the difference between SAST, DAST, IAST and SCA?
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SAST (Static Application Security Testing) reads the source code looking for vulnerable patterns. DAST (Dynamic) probes the running application from outside. IAST (Interactive) instruments the runtime and observes execution. SCA (Software Composition Analysis) checks third-party dependencies against CVE databases. You want all four: SAST for your code, SCA for what you import, DAST + IAST for runtime behaviour.
Do small teams need DevSecOps or is it for big enterprises?
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Small teams need it MORE, because one breach is existential. The good news is the bar to start is low: enable GitHub Advanced Security or Snyk free tier on every repo (covers SAST + SCA + secrets), add Trivy to your container builds (covers image scanning), and you're 70% of the way to a credible DevSecOps posture. The other 30% is tooling for runtime protection + IaC scanning + policy-as-code, and that scales with your maturity, not your headcount.
Is DevSecOps compatible with ISO 27001 / SOC 2 / DPDP?
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It's the easiest path to all three. ISO 27001 Annex A controls A.8.28 (secure coding), A.8.29 (security testing in development), and A.8.31 (separation of dev/test/prod) are exactly what a DevSecOps pipeline enforces by default. SOC 2 CC8.1 (system change-management) maps to your PR pipeline + IaC gates. DPDP Rule 6 (security safeguards) is satisfied by SAST/SCA in CI + runtime protection in prod. You get the controls automated rather than audited.
Want help rolling this out?
Proeffico's cloud + security practice has rolled out the full DevSecOps phase set for BFSI, healthcare, manufacturing and SaaS clients across India and the GCC. ISO 27001 certified. We can come in at any phase — discovery typically takes 1-2 weeks.
