About SemarkIT

About

20+ years of experience with Linux, BSD, networking and open-source operations.

I’m Henrik Krysteli Semark, and I’ve worked with Linux, BSD and networking since 2000. What started as external IT consulting for schools and small businesses has grown into a deep specialization in open-source infrastructure — from reliable server operations to IPv6 rollouts and BGP peering with external networks.

I believe in solutions that are transparent, well documented and built to last. No unnecessary complexity, no vendor lock-in — just solid infrastructure that works.

In recent years I’ve focused deeply on Infrastructure-as-Code and a DevSecOps mindset — both professionally and on my own infrastructure at home. Everything is defined in Ansible and versioned in Git, so nothing is changed by hand and there’s never drift between what’s documented and what’s actually running in production.

Alongside consulting, I’m active in the open-source community: I’ve reported and helped fix bugs with Debian developers, contributed to the FreeBSD release, and taken part in Danish Linux forums and IRC channels for many years.

  • 2023 – Senior Infrastructure Specialist Region Midtjylland (automation platform)

    Full-time, responsible for the automation platform, built on Infrastructure-as-Code and a DevSecOps mindset. Everything is defined and managed through Ansible, so environments never drift from their intended, documented state.

  • 2023 – Freelance Consultant Carve Consulting P/S

    Continuing as a freelance consultant alongside full-time employment at Region Midtjylland, having previously been a full-time employee there.

  • 2015 – 2023 Senior Consultant Carve Consulting P/S

    Development of custom solutions, IT architecture, project management and automation through Robotics. Operating internal and external customer hosting, including on-prem and hybrid Kubernetes clusters spanning multiple datacenters.

  • 2014 – 2015 Developer & Operations Lead Saxo Read, Saxo.com

    Responsible for 24/7 operations of the Debian-based CDN and the IPv6 rollout, including acquiring a Provider Independent range and multi-homing with external partners.

  • 2013 – 2014 Co-founder BITTOO Ebooks A/S

    Built a Debian-based CDN for secure delivery of digital content. The product was acquired by Saxo.com in 2014.

  • 2010 – 2013 Ground station & satellite team DTU Space (DTUsat-II)

    Setting up and preparing the ground station for DTU's CubeSat satellite, and taking part in building the satellite itself.

  • 2007 – Founder SemarkIT

    Independent consultancy for Linux servers, networking and advisory work.

  • 2000 – 2015 External IT Consultant Schools & companies

    Responsible for Linux firewalls, virtualization and networking at Birkerød Gymnasium, Birkerød Privatskole and Elleslettegård, among others.