[email protected]:~$ whoami

Omer Sen

[email protected]:~$ cat role.txt

Linux / UNIX / DevOps, DevSecOps and MLOps engineer

[email protected]:~$ whereis omer

omer: /earth/europe/uk/london

[email protected]:~$ uptime

28+ years · since 1998, from UNIX servers to Kubernetes, Vault and GPU clusters on Azure, AWS, GCP and on-prem

[email protected]:~$ uname -a

Linux (RHEL, SLES, OEL, Ubuntu, Debian) · FreeBSD · OpenBSD · Solaris / OpenSolaris

[email protected]:~$ ls ~/

about/ writing/ open-source/ photos/ charity/ contact/

[email protected]:~$

~/skills $ cat skills.yml

What I work on

os:        [linux, freebsd, openbsd, solaris]
platforms: [kubernetes, openshift, rke2, rancher]
iac:       [terraform, ansible, packer, helm, argocd]
ci_cd:     [gitlab, github-actions, azure-devops, jenkins]
security:  [vault, istio-mtls, cis, iso27001, siem]
ai:        [nvidia-gpu, kubeflow, mlflow, langgraph]
cloud:     [aws, azure, gcp, on-prem]

Platforms & DevSecOps

Kubernetes and OpenShift platforms, GitOps pipelines, infrastructure as code, Vault and zero-trust service meshes.

AI & GPU infrastructure

NVIDIA GPU clusters, MLOps platforms and sandboxed agentic AI workloads.

Security

Hardening, vulnerability management, SIEM and compliance. ISO 27001 Lead Auditor.

~/writing $ ls -t | head -3

Notes from the lab

One GPU, thirteen labs

Building a hands-on course for open-source NVIDIA Run:ai 3.0 on one workstation: 13 labs with narrated videos, and six lessons the cluster taught that the docs did not. October 2026. Also on LinkedIn.

Read →

An OpenShell alternative?

Testing Docker Sandboxes (sbx) with the same labs as the OpenShell course: network, credentials, host files, HTTP rules and Claude Code inside a microVM, side by side. October 2026. Also on LinkedIn.

Read →

Giving AI agents a seatbelt via OpenShell

Confining coding agents with NVIDIA OpenShell: one YAML policy for files, hosts, HTTP paths, MCP tools and where each credential may go, enforced at the kernel and network layers. The short version of a 19-lab course. October 2026. Also on LinkedIn.

Read →

cd ~/writing

~/open-source $ uptime –since 1998

A long road with Linux, BSD and Solaris

I co-authored a book on the FreeBSD operating system, translated O’Reilly’s Network Security Hacks and the BSD brochures into Turkish, and have had the pleasure of meeting many of the people who built the systems I use every day.

cd ~/open-source