Gary Wenneker
Lead Engineer at iO
Utrecht, Utrecht, Netherlands
Summary
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SeniorGary Wenneker is a Lead Engineer and Sitecore Certified Developer with over a decade of hands-on experience architecting and delivering complex SharePoint and .NET solutions across large enterprises. He blends strategic, high-level architecture with deep implementation skills—covering SharePoint On-Prem/Online, ASP.NET, Angular/React front-ends, ElasticSearch and bespoke integration work. Gary has repeatedly led Sitecore and SharePoint transformations for major brands (Rabobank, Mercedes-Benz, Volkswagen, Henkel) while keeping projects politically sensitive and operationally secure. He also builds modern web platforms using Angular/TypeScript and Web APIs, and has applied ElasticSearch-backed architectures for public portals and data-heavy applications. Beyond technical delivery he has founded and run product-focused agencies, showing an entrepreneurial instinct for turning domain requirements into usable digital services. A certified specialist who still codes, he pairs pragmatic engineering with strong communication—often acting as the bridge between C-suite strategy and developer execution.
11 years of coding experience
15 years of employment as a software developer
German, English, Dutch
Stackoverflow
11reputation
4kreached
2answers
0questions
Github Skills (91)
trainer9
typescript9
cli8
sitecore-jss8
menu8
sitecore8
fivem8
signalr-hub7
angular7
react7
frontend7
iis6
blazor6
signalr-client6
asp-net6
Programming languages (9)
Github contributions (5)
GaryWenneker/Umbrella.PanTau
May 2019 - Apr 2020
Contributions:5 commits, 5 pushes, 2 branches in 11 months
GaryWenneker/blog
Dec 2023 - Sep 2025
Contributions:20 PRs, 30 pushes, 20 branches in 1 year 9 months
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