Koos began his career as an all-round 'generalist,' gaining experience primarily at smaller companies. He helped them with configuring, migrating, and troubleshooting Windows environments, private cloud infrastructure, and everything that comes with it, such as networking, storage, and hypervisors.
Since 2017, he has focused mainly on Microsoft Azure, with a specific emphasis on Azure security and Microsoft Security products such as Microsoft Sentinel and Defender XDR. In addition to advising on architectural design choices, he finds it essential to be able to build all the solutions himself.
Lately, he has specialized in Microsoft Sentinel implementations and improving Security Operations Centers. He achieves this by developing new detections, onboarding (custom) log sources, and applying processes for the automated enrichment and triage of security incidents.
Koos enjoys sharing his challenges and solutions with the community through his articles on GitHub, Medium [https://aka.ms/koos], and during sessions at events. This led Microsoft to award him the MVP title in 2023 for both the ‘Cloud Security’ and ‘SIEM & XDR’ technology areas.
