I am Leo, an Amsterdam-based freelance system administrator and site reliability engineer with more than 30 years of IT experience.

I help start‑ups and scale‑ups with device & identity management and with on‑premise & cloud infrastructure engineering.

Hire me to keep your IT systems and services up & running!

System administration

  • Device management
    Streamlining deployment of computers, phones and tablets
  • Identity management
    Providing users with a unified login experience
  • Security awareness training
    Empowering users to recognize cyber threats before falling victim
  • Onboarding and offboarding
    Automating user provisioning for consistent account management
  • Device deployment
    Handing out fully functional equipment on a user's first workday
  • Asset management
    Keeping track of hardware and software within the company
  • IT support
    Fixing minor and major issues that users encounter

Site reliability engineering

  • Infrastructure As Code
    Delivering automated and idempotent system deployments
  • Infrastructure monitoring
    Providing insight into the state and security of systems and services
  • Self-hosted cloud services
    Using open-source software to ensure control over company data
  • Disaster recovery backups
    Minimizing the chance of data loss and maximizing peace of mind


  • Operating systems
    iOS, macOS, Ubuntu
  • Coding & scripting
    Ansible, Bash, Git
  • Code hosting
    GitHub, GitLab
  • Device management
    Apple Business Manager, Kandji, Mosyle, SimpleMDM
  • Identity management
    Auth0, Google Cloud Identity, Okta, OpenLDAP
  • Infrastructure monitoring
    Grafana, Nagios, Sandfly Security, Wazuh
  • Productivity
    Discourse, Google Workspace, LiquidFiles, Mattermost

Key strengths

  • Finding solutions
  • Getting things done
  • Paying attention to detail

Company details

  • Location: Amsterdam, Netherlands
  • Chamber of Commerce: 32068113
  • Tax registration: NL001908292B71