Dennis Irsigler

Cloud Engineer based in Germany - specializing in Google Cloud Platform, Cloud Native systems, Golang, and Cloud Security.

Experience

Cloud Engineer

METRO Markets GmbH, Düsseldorf

Mar 2019 - Present
  • Designed and built a greenfield Cloud Native GCP environment using modern open-source tooling; defined architecture principles and integrated them into GitLab CI/CD pipelines
  • Scaled and operated a highly available multi-project GCP infrastructure (40+ projects, 300+ developers, 200+ microservices) across dedicated dev, staging, and production environments with backup, monitoring, and security controls
  • Managed GCP organization-level governance with modularized Terraform; developed automated tests to enforce compliance, reusability, and consistency
  • Served as Security Champion, driving SCA/SAST scanning and SBOM generation across all CI/CD pipelines and establishing a company-wide Vulnerability Disclosure Program
  • Implemented GitOps workflows using Helm and ArgoCD for declarative, continuous delivery
  • Built custom automation and internal tooling in Golang

Linux System Engineer

PlusServer, Cologne

Dec 2016 - Feb 2019
  • Provided 3rd-level technical consulting and support for managed and unmanaged Linux systems of major enterprise customers, including architecture and optimization recommendations
  • Planned, executed, and documented system migrations between datacenter locations and from physical servers to virtual environments (VMware vSphere), including early cloud migrations to AWS and GCP
  • Performed disaster recovery for key accounts and standard customers — from compromised systems to failed upgrades — restoring individual servers and full application environments
  • Supported the pre-sales team with requirements analysis, solution architecture, technical evaluations, and proof-of-concepts for key accounts

System Administrator

Gustav Grolman GmbH, Neuss

Jul 2016 - Nov 2016
  • Administered Windows and Linux server infrastructure and client devices across a European environment, providing support in German and English
  • Managed backup and restore operations to ensure data integrity and business continuity
  • Introduced early automation and process optimization using PowerShell, Bash, and Ansible

Skills

Cloud

  • Google Cloud Platform
  • AWS

Deployment

  • Terraform
  • Helm
  • ArgoCD
  • GitOps
  • Ansible

Containers

  • Kubernetes
  • Docker
  • Serverless

CI/CD

  • GitLab CI
  • GitHub Actions

Observability

  • Prometheus
  • Grafana
  • Victoria Metrics

Languages

  • Golang
  • Python
  • Bash

Security

  • Zero Trust
  • SCA
  • SAST
  • SBOM
  • VDP
  • IAM
  • Supply Chain Security

Certifications

  • Google Cloud - Professional Cloud Architect
  • AWS - SysOps Administrator Associate
  • Linux Foundation - LFD121 Developing Secure Software

Languages

German Native
English Fluent