René Zingerle - DevSecOps & Kubernetes Engineer (Freelance)

Q: Where is René based?

René is based in Jenbach, Austria and can operate in on-site , hybrid , and remote work models.

Q: What languages does René speak?

René speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does René have?

René has at least 23 years of experience. During this time, René has worked in at least 5 different roles and for 4 different companies . The average length of individual experience is 5 years and 8 months . Note that René may not have shared all experience and actually has more experience.

Q: What is René's latest experience?

René's most recent position is DevSecOps & Kubernetes Engineer (Freelance) at mgm technology partners GmbH .

Q: What companies has René worked for in recent years?

In recent years, René has worked for mgm technology partners GmbH and Rothirsch Tech GmbH .

Q: Which industries is René most experienced in?

René is most experienced in industries like Manufacturing and Information Technology .

Q: Which business areas is René most experienced in?

René is most experienced in business areas like Information Technology , Operations , and Strategy . René also has some experience in Product Development , Production , and Customer Service .

Q: Which industries has René worked in recently?

René has recently worked in industries like Information Technology .

Q: Which business areas has René worked in recently?

René has recently worked in business areas like Information Technology , Operations , and Strategy .

Recommended expert

Jenbach, Austria

Experience

Sep 2022 - Dec 2025

3 years 4 months

DevSecOps & Kubernetes Engineer (Freelance)

mgm technology partners GmbH

Development of a Custom Jenkins Shared Library (Groovy)
Integration of security checks in CI/CD pipeline (Shift-Left Approach)
Automated vulnerability scanning and remediation workflows
GitOps-based deployments with ArgoCD
Semantic versioning automation with Git integration
Container lifecycle management (Build/Scan/Tag/Push)
ArgoCD webhook integration for event-driven deployments
Complete cluster automation with Ansible
Bare-metal Kubernetes installation from scratch
High-availability control plane setup
Unified deployment system for multi-application orchestration
Configuration management according to NIST SP 800-128
Host security: Linux hardening, SELinux/AppArmor
Network security: NetworkPolicies, micro-segmentation
Application security: RBAC, Pod Security Standards
Data security: Encryption at rest and in transit
Defense-in-depth principles
Certificate management with cert-manager
Secrets management with External Secrets Operator connected to Vault
Infrastructure monitoring with Checkmk
Prometheus/Grafana monitoring stack
Security event detection and logging
Automated health checks and incident response procedures
MetalLB load balancing for bare-metal
Nginx ingress controller with SSL passthrough
NetworkPolicies for security zones
Rook-Ceph distributed storage, CNI configuration (Weave Net)
Container & orchestration: Kubernetes (bare-metal), Docker, Helm
CI/CD & GitOps: Jenkins (Custom Shared Library), ArgoCD, Groovy
Automation: Ansible, Bash, Python
Security: nftables, RBAC, NetworkPolicies, cert-manager, Vault, Sealed Secrets
Monitoring: Checkmk, Prometheus, Grafana
Storage & networking: Rook-Ceph, MetalLB, Nginx Ingress, Calico
Collaboration: Jira, Confluence
OS: Debian, Ubuntu

Sep 2016 - Present

9 years 7 months

Founder & Managing Director | DevSecOps Engineer

Rothirsch Tech GmbH

Built and run an on-premise data center in Tyrol, Austria with bare-metal servers, Kubernetes clusters, CI/CD pipelines
Handled strategy, finances, customer relations, compliance and IT security governance
Jenkins Shared Library: Groovy functions for CI/CD automation, semantic versioning, Docker lifecycle, ArgoCD integration
GitOps architecture: ArgoCD App-of-Apps pattern, Kustomize overlays, automated ApplicationSet generation
Security integration: Policy-as-Code, automated security testing in CI/CD, container image scanning
Ansible framework: Production-grade custom roles for cluster lifecycle, database, network, IAM, mail
Puppet framework: Configuration management compliant with NIST SP 800-128, 5-layer governance structure
Kubernetes cluster from scratch: bare-metal multi-node setup, HA control plane, Rook-Ceph storage, MetalLB load balancing
Security: RBAC, NetworkPolicies, Pod Security Standards, TLS/mTLS, secrets management (Vault)
Production services: Hosting platforms (insa.tirol), multi-tenant customer deployments
System security: Linux hardening, kernel tuning, patch management
Network infrastructure: nftables/iptables, Nginx/Apache, Strongswan VPN, Bind9 DNS
Identity & Access Management: OpenLDAP multi-master replication, Keycloak SSO, PKI & certificate management, MFA
Database & high-availability: MariaDB Galera multi-master clustering, MaxScale proxy, automated backup/restore workflows, zero-downtime maintenance
Custom containerized services: WordPress, mail (Postfix/Dovecot/Amavis), IAM (OpenLDAP/Keycloak), monitoring
Multi-stage builds, security hardening, multi-architecture support (AMD64, ARM, ARM64)
Monitoring & observability: Prometheus, Grafana, ELK Stack (Filebeat, Metricbeat), Icinga2, custom health check endpoints, security event detection
API-driven & event-driven automation: n8n workflow automation, GitLab API, ArgoCD API, Kubernetes API, webhooks
Container & orchestration: Kubernetes (bare-metal), Docker, Helm, Kustomize
CI/CD & GitOps: Jenkins (Custom Shared Library), ArgoCD, GitLab CI, n8n
Automation: Ansible, Puppet, Terraform, Bash, Python, Groovy
Security: nftables, Strongswan VPN, TLS/mTLS, HashiCorp Vault + External Secrets Operator
Monitoring: Prometheus, Grafana, ELK Stack, Icinga2
Database: MariaDB Galera, MaxScale
Storage & networking: Rook-Ceph, MetalLB, Nginx, Bind9 DNS
IAM: OpenLDAP, Keycloak, cert-manager, PKI
Mail: Postfix, Dovecot, Amavis, SpamAssassin, ClamAV, OpenDMARC, OpenDKIM
AI & workflow automation: Claude Code, n8n with LLM integration
OS: Debian, Ubuntu

Jan 2011 - Dec 2016

6 years

Austria

Linux System Administrator & Automation Engineer

GMO Mechatronik GmbH

Built secure server infrastructure using open-source technologies (FLOSS)
Implemented VPN (Strongswan) and firewall configuration (iptables)
Managed network services: DNS (Bind9), DHCP, NTP, mail (Postfix with spam filtering)
Deployed Samba as Active Directory Domain Controller for centralized authentication and SSO
Performed system hardening, security monitoring, log analysis, and patch management
Automated routine tasks and workflows with custom Bash and Python scripts
Networking: Strongswan VPN, iptables, Bind9 DNS, DHCP, NTP
Mail: Postfix, SpamAssassin
Directory Services: Samba AD DC, LDAP
Scripting: Bash, Python
OS: Debian, Ubuntu, RHEL

Jan 2008 - Dec 2010

3 years

Austria

IT Technician Apprenticeship & First Level Support

Heinzle GmbH

Completed an IT technician apprenticeship
Provided first level support for internet and IT services

Jan 2003 - Dec 2011

9 years

Austria

Cabinetmaker Apprenticeship, Journeyman & CNC Developer

GMO Mechatronik GmbH

Completed a cabinetmaker apprenticeship and journeyman qualification
Built a CNC milling machine: partner did mechanical construction, I did electronics and software (LinuxCNC)
Developed custom software for CNC code replication using Bash and awk
Automated manufacturing processes with user-friendly tooling
CNC & Automation: LinuxCNC
Scripting: Bash, awk
OS: Debian

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Manufacturing and Information Technology.

Manufacturing

Information Technology

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Operations, Strategy, Product Development, Production, and Customer Service.

Information Technology

Operations

Strategy

Product Development

Production

Customer Service

Summary

Full-time freelance DevSecOps Engineer with 15+ years in IT and 10+ years building my own company, Rothirsch Tech GmbH. I run a self-built on-premise data center in Tyrol, Austria, using Kubernetes to provide fully automated web services for regional customers. CISSP-certified security professional combining hands-on infrastructure expertise with CI/CD automation, Infrastructure-as-Code, and security-first design.

Skills

On-premise Infrastructure
Automation & Ci/cd (Jenkins, Gitlab Ci, Argocd)
Infrastructure-as-code (Ansible, Python, Bash)
Container Orchestration (Kubernetes, Docker)
Security-first Architecture (Cissp)

Languages

German

Native

English

Advanced

Education

Oct 2008 - Jun 2010

Heinzle GmbH

IT technician apprenticeship · Austria

Oct 2003 - Jun 2011

Tischlerei Roberto Zingerle

Cabinetmaker apprenticeship · Austria

Certifications & licenses

CISSP – Certified Information Systems Security Professional

ISC²

SSCP – Systems Security Certified Practitioner

ISC²

Statistics

Experience

Total positions 5

Experience in Manufacturing 14 y

Avg length 6 y 1 m

Longest experience 9 y 6 m

Global Experience

Countries worked in 1 (Austria)

Primary country Austria

Expertise

Recent roles DevSecOps & Kubernetes Engineer (Freelance), Founder & Managing Director | DevSecOps Engineer, Linux System Administrator & Automation Engineer

Main industries Manufacturing, Information Technology

Main business areas Information Technology, Operations, Strategy

Qualifications

Certifications earned 2

Profile

Created

March 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is René based?

René is based in Jenbach, Austria and can operate in on-site, hybrid, and remote work models.

What languages does René speak?

René speaks the following languages: German (Native), English (Advanced).

How many years of experience does René have?

René has at least 23 years of experience. During this time, René has worked in at least 5 different roles and for 4 different companies. The average length of individual experience is 5 years and 8 months. Note that René may not have shared all experience and actually has more experience.

What roles would René be best suited for?

Based on recent experience, René would be well-suited for roles such as: DevSecOps & Kubernetes Engineer (Freelance), Founder & Managing Director | DevSecOps Engineer, Linux System Administrator & Automation Engineer.

What is René's latest experience?

René's most recent position is DevSecOps & Kubernetes Engineer (Freelance) at mgm technology partners GmbH.

What companies has René worked for in recent years?

In recent years, René has worked for mgm technology partners GmbH and Rothirsch Tech GmbH.

Which industries is René most experienced in?

René is most experienced in industries like Manufacturing and Information Technology.

Which business areas is René most experienced in?

René is most experienced in business areas like Information Technology, Operations, and Strategy. René also has some experience in Product Development, Production, and Customer Service.

Which industries has René worked in recently?

René has recently worked in industries like Information Technology.

Which business areas has René worked in recently?

René has recently worked in business areas like Information Technology, Operations, and Strategy.

What is René's education?

René attended Heinzle GmbH for IT technician apprenticeship.

Does René have any certificates?

René has 2 certificates. These include: CISSP – Certified Information Systems Security Professional and SSCP – Systems Security Certified Practitioner.

What is the availability of René?

René will be available full-time from May 2026.

What is the rate of René?

René's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.