About Tristan
I'm an enthusiastic and driven Linux, Unix and cloud consultant. I have been fascinated by computers and networks since my early youth and have more than 20 years of professional experience. I am a quick learner and very persistent when it comes to solving problems.
My professional goals are
- to design, deploy and maintain state of the art IT environments,
- to standardize, automate and script as much as possible and
- to help define a stable and cost-effective long term strategy for the IT department.
Dutch
Native or bilingual
English
Fluent
French
Conversational
German
Basic
Can work on-site
Diest (up to 50km)
Experience
- OMPPlatform ExpertSOFTWARE PUBLISHINGMarch 2025 - Today (1 year and 3 months)Wommelgem, AN, BelgiumMember of the Platform Core team responsible for operating and evolving a large-scale hybrid Kubernetes platform (on-premise vSphere VMs + Azure AKS), with 30+ clusters centrally managed via Rancher. Developers deploy workloads through Helm charts and ArgoCD in a GitOps workflow backed by Azure DevOps and Azure Pipelines.Key contributions:- Day-to-day cluster operations: Kubernetes upgrades (1.28 1.34), security patching, performance tuning and troubleshooting of networking, storage and scheduling issues.- Designed and executed a zero-downtime node OS upgrade from Ubuntu 20.04 to 24.04 across the entire on-premises fleet, preserving running workloads throughout.- Built and deployed new platform features and infrastructure changes with Terraform and Ansible.- Resolved production incidents involving cluster networking, persistent storage and deployment sync failures through deep-dive analysis of Rancher, kubelet logs and etcd state.keywords: aks ansible argocd azure azure devops etcd helm kubernetes rancher terraform vsphere
- KBC Global ServicesSystem EngineerBANKING AND INSURANCEJanuary 2023 - November 2024 (1 year and 10 months)Leuven, BelgiumDevOps engineer in the KateCoin and KATE team within a financial services environment.Key contributions:
- Migrated resources from ad-hoc AWS accounts to standardized, centrally managed accounts.
- Managed and maintained AWS EKS clusters.
- Extended EKS deployments with AWS App Mesh for service mesh functionality.
- Automated weekly production release coordination tasks.
- Integrated OIDC authentication via Azure AD into IntellectEU Catalyst Blockchain Manager, which previously only supported basic auth.
Keywords: app mesh aws ci/cd cloudwatch docker ec2 eks helm iam kubernetes kustomize terraform - DPG Media BelgiëDevOps EngineerPRESS AND MEDIAMay 2017 - December 2022 (5 years and 7 months)Vilvoorde, BelgiumMember of a six-person squad responsible for live and on-demand video streaming infrastructure for VTM GO, Streamz, HLN and other DPG properties. Work organized using Scrumban with a strong emphasis on IaC, security and uptime.Key contributions:
- Migrated services from AWS EC2 instances to containers on AWS ECS Fargate.
- Decommissioned on-premises infrastructure in favour of cloud infrastructure with zero downtime.
- Maintained CI/CD pipelines across multiple repositories and platforms, with integrated security scanning (Jenkins, Snyk).
- Upgraded 100+ servers to a uniform patch level of firmware, hypervisor and OS.
- Consolidated servers from three datacenters into one.
- Migrated VMs across mixed hypervisor generations (ProLiant G1–G9) to a homogeneous platform.
ansible aws ci/cd cloudformation docker ec2 ecs fargate grafana jenkins nginx prometheus python shell scripting snyk terraform traefik ubuntu varnish zfs
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Education
- Kubernetes and Cloud Native Security Associate (KCSA)The Linux Foundation2027Kubernetes and Cloud Native Security Associate (KCSA)
- Certified Kubernetes Application Developer (CKAD)The Linux Foundation2027Certified Kubernetes Application Developer (CKAD)
Certifications
- CKS: Certified Kubernetes Security SpecialistThe Linux Foundation2026
- CKA: Certified Kubernetes AdministratorThe Linux Foundation2025