Description

Senior Linux / DevOps Engineer specialized in infrastructure automation, cybersecurity hardening, observability, and secure Linux environments.

With 25+ years of hands-on experience, I help organizations build, automate, secure, and maintain reliable infrastructure across on-premise and cloud environments.

Core expertise:

• Linux administration (Ubuntu, RHEL/CentOS)

• Infrastructure as Code (Terraform, Ansible)

• CI/CD automation & GitOps

• Monitoring, logging & observability (Zabbix, ELK, Prometheus)

• Security hardening & system baselines

• ISO 27001 / NIS2 gap remediation

• Detection engineering & SIEM support

• Bash & Python scripting

• VMware & KVM virtualization

• Remote infrastructure & security management

I work with organizations that require stable, secure, and maintainable infrastructure with a strong focus on automation, compliance, and operational visibility.

Available for remote freelance projects across Europe.

Industry field of expertise

Languages

Dutch
Native or bilingual
English
Fluent
German
Fluent
Hungarian
Basic

Workplace preferences

Remote only

Primarily works remotely

Freelance work
IT specialist
DIGITAL AND IT
January 2024 - Today (2 years and 5 months)
Baja, Hungary

- Installed Bebian Based backup server for additional layer of security for Cloud services
- Setup a Matrix server instance for several projects to have internal communications (chat, voice & video calls)
- Provided a PeerTube video platform.
- Hardened web stacks with Lynis, fail2ban and SSH lockdowns Biotonus, 2024
- Designed and deployed a new Linux-based infrastructure using Ubuntu, KVM, Ansible, Docker, and custom cloud-init workflows — reducing provisioning time by ~75%.
- Hardened Apache and Nginx web services using Lynis, fail2ban, SSH lockdowns, and sysctl optimalization, improving baseline security and minimized the system's attack surface.
- Built and maintained dev/test/prod infrastructure with version-controlled provisioning, enabling consistent deployments and streamlined team workflows.
- Implemented Git-based deployment using custom webhooks, ensuring faster and traceable rollouts for internal websites and tools.
- Led the development of a new, multilingual company website, with focus on performance, uptime and CI-based rollout.
- Maintained tooling such as DokuWiki, Planka, and Forgejo to support documentation, task tracking, and code collaboration.

Linux Ansible Virtualisation Technical project management
ASML
Connectivity Architect Product IT
DIGITAL AND IT
August 2022 - August 2023 (1 year)
Veldhoven, Netherlands
• Defined the vision, roadmap, and lifecycle management for the BRES application ecosystem.
• Acted as senior escalation point and operations advisor, guiding critical IT strategy.
FC-26 - ASML
DevOps Team Lead EPS
DIGITAL AND IT
October 2020 - July 2022 (1 year and 9 months)
Veldhoven, Netherlands
• Engineered and maintained the EPS platform used by ~10 development teams, introducing versioned package support (akin to app-store compatibility layers) to streamline deployments and reduce integration issues.
• Built and maintained a GCP-based EPS development & test platform that reduced environment deployment time from 2–3 days to under 4 hours.
• Managed Linux-based infrastructure (HP Blades + NAS) powering the EPS platform, including global support for ~40 installations across ASML's worldwide engineering sites.
• Drove EPS platform roadmap and acted as key liaison between infrastructure and development teams, influencing application design and aligning stakeholder expectations with operational constraints.
• Balanced hands-on engineering with team leadership, serving as key liaison between internal teams and external stakeholders. Translated technical direction into actionable steps and priorities.