In my free time I can be found cycling, walking with our Wolf or playing with our 4 cats. My other free time activities include reading books, skiing, playing chess and exploring all kind of topics I get interested in. I have a passion for learning new technologies and improving my knowledge on all kind of topics.
In 2002 I got my MSc. in Technical Computer Science from the University of Twente. After graduating with a specialisation in Computer Security I started working for an Internet Company. In 2005 I made the switch to IT consultancy and have been doing that ever since.
I help customers design, implement, improve and automate the rollout and management of their IT infrastructure in the cloud and/or on premise.
Beside my consultancy and technical pre-sales activities I am also active as a technical trainer, with a focus on teaching SaltStack and SUSE courses.
An incomplete selection of my technical skills. An overview of my certifications can be found here.
RedHat Enterprise Linux
SuSe Linux Enterprise Server
Oracle Cloud Infrastructure
Short summaries of projects I have been involved in.
Migrating a customer's billing system to Oracle Cloud.
Managed Service Provider
Design and implementation of a hashicorp stack consisting of Vault, Nomad and Consul.
Domain Name Registry
I advised on the alternatives for SUSE OpenStack, and helped them switch to the new RedHat OpenStack platform.
Solving a problem within their Rook setup as well as sharing Ceph knowledge and giving advise on how to improve their Ceph setup
Vegetable Breeding Company
Improving, upgrading, managing and rolling out 1000+ desktops using ansible.
Design and implementation of the HA infrastructure for their website on a cloud platform.
Online Liquor Seller
I detected and solved misconfigurations in their Ceph deployments avoiding major problems in case of data center room outages.
I helped the customer improve the way they use SaltStack within their organisation as well as improving their knowledge of how to use SaltStack.
Design and implementation of a completely Open Source based OpenStack environment.
Building a dashboard using Flask and Python to show the status of all OpenStack environments in one overview.
Migrating part of their infrastructure to a cloud environment.
Designing and building their Big Data platform in a High Performance Cloud Computing Platform.
Cloud & Big Data Consultant
Coaching the team on building a complete Open Source based OpenStack solution.
Upgrade of their Ceph environment to a newer version.
Teaching SaltStack to one of their teams as well as helping the team setup their SaltStack environment.
Global IT services Company
Saltstack Trainer & Consultant
Management of the systems and applications related to passenger handling and flight planning.
Redesign and upgrade of their puppet infrastructure.
Human Resource Provider
Speaking / Teaching
A global overview about the subjects I have given workshops, talks and courses about. A complete overview can be found here.
SUSE Enterprise Storage
Red Hat Linux
Feel free to invite me for dinner if you think we can have an interesting or mutual benefitting conversation. If you have another offer, opportunity, or introduction that might make my life more interesting you can send an email to contact (at) jeroen (dot) se. Due to my other priorities, for example playing with my cats, I’ll only respond to those proposals that are a good match for my schedule and interests.