[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 ~/
~/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
Agentic SecOps on one workstation
Rebuilding the SUSE AI Factory and NVIDIA stack with open source, then testing seven of its security claims, from deny-by-default egress to audit logging. September 2026. Local copy.
Wired Langfuse observability into a RAG pipeline
Tracing and measuring a retrieval-augmented generation pipeline in production with Langfuse. June 2026. Local copy.
Built a 5-node AI agent in a weekend
What LangGraph actually teaches you about agent design, with code and container images. June 2026. Local copy.
~/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.