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I’m passionate about Linux, open source and cybersecurity.
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I’m passionate about Linux, open source and cybersecurity.

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ceaz-sec/README.md

Hi, I'm Marcus

Security Engineer · Software Supply Chain Security · Zero Trust · Open Source Security

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What I do

I'm a security engineer with a research first mindset, aiding in securing open source software.

My work focuses on the intersection of software supply chain security, application security, and cloud security.

I focus on:

  • Auditing software dependencies, packages, and container images for supply chain risks
  • Securing CI/CD pipelines by improving artifact integrity, build trust, and deployment security
  • Applying software supply chain security practices including SLSA, SBOM management, zero-trust CI/CD, hardened pipelines, and continuous dependency monitoring

Core Strengths

Software Supply Chain Security

  • Software dependency risk assessment: vulnerable packages, malicious dependencies, and dependency confusion
  • SBOM generation and analysis for open-source component visibility
  • CI/CD pipeline security: build integrity, artifact validation, and secure automation workflows
  • Supply chain attack detection: package hijacking, typosquatting, and compromised maintainers

Browser & Extension Security

  • Static and dynamic analysis of browser extensions (Manifest V2/V3)
  • JavaScript source review: innerHTML sinks, postMessage trust boundaries, prototype pollution
  • Shadow AI detection and policy enforcement via proxy interception
  • Supply chain risk assessment: permission creep, update hijacking, and C2 callbacks

Security Engineering & Tooling

  • Python and Bash scripting for security automation and triage
  • mitmproxy (containerized) for HTTPS traffic analysis
  • SAST triage pipelines and log sanitization tooling
  • SIEM/EDR: Wazuh, Jamf Protect, Tripwire, and SentinelOne
  • Containerized lab environments with Docker and Nomad on Linux

Secrets & Access Management

  • Secrets management: vault architecture, dynamic secrets, PKI automation, credential lifecycle management
  • Zero Trust integration patterns across cloud and endpoint environments
  • Session security: token hijacking mechanics, OAuth abuse, and credential exposure vectors

Daily Tooling

Cosign Syft Grype OSV Scanner OpenSSF Forgejo Nomad

Software Supply Chain Security
Syft · Grype · OSV-Scanner · Cosign · OpenSSF

Platform Engineering
GitHub Actions · Forgejo · Nomad


Current Focus

  • Software supply chain security: SBOMs, dependency analysis, artifact integrity, and SLSA practices
  • Securing CI/CD pipelines through automation, policy enforcement, and zero-trust workflows
  • Cloud security engineering: identity controls, secrets management, and infrastructure hardening
  • Open source security research: vulnerability analysis, package risks, and dependency trust
  • IAM and Zero Trust architecture: least privilege, role separation, and access lifecycle management
  • Browser and endpoint security research: extension auditing, data protection, and threat analysis

📊 Activity Snapshot


Let's Connect

LinkedIn GitHub Blog

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  1. Baro.jl Baro.jl Public

    OSS trust verification for packages from the pypi registry. The tool looks for owners/authors, version, digests and evidence of provenance.

    Julia 1

  2. browser-ext-risk-review browser-ext-risk-review Public

    This cli tool evaluates risk and safety of chrome browser extensions.

    Python 1

  3. data-in-transit-security-audit data-in-transit-security-audit Public

    This tool evaluates the claim of data in transit security for websites, urls and common endpoints.

    Lua 1