Mariusz Kaszewiak
Senior Technical Support Engineer at Microsoft
Cobh, Ireland
Summary
🤩
Rockstar🎓
Top SchoolMariusz Kaszewiak is a Senior Technical Support Engineer with a solid foundation in software engineering and one year of enterprise-level support experience complemented by prior development roles. He has deep hands-on experience troubleshooting complex issues across Microsoft technologies (Open XML SDK, Exchange, Active Directory, Windows Server) and cloud-native platforms like VMware Tanzu, often collaborating with R&D to turn customer reports into bug fixes and documentation. Comfortable coding in C#, Java, PowerShell and JavaScript frameworks, he bridges development and support by writing fixes, knowledge articles, and reproducible lab environments to speed resolution. Fluent in English and Polish, he excels at clear technical communication with enterprise customers and cross-functional teams. Known for rapid problem diagnosis and a disciplined work ethic, he combines a developer’s attention to detail with a support engineer’s customer focus. An uncommon strength is his track record of converting customer issues into lasting fixes and documentation that reduce future support load.
1 year of coding experience
7 years of employment as a software developer
FETAC LEVEL 5 PC MAINTENANCE & SERVICING, FETAC LEVEL 5 PC MAINTENANCE & SERVICING at Cork College of CommerceFETAC LEVEL 6 Cloud Computing, FETAC LEVEL 6 Cloud Computing at St.John's College CorkBachelor’s Degree Computer Science, Bachelor’s Degree Computer Science at Munster Technological University
Polish, English
Github Skills (6)
xml10
docx10
sdk10
openxml6
microsoft6
doc5
Programming languages (2)
Github contributions (3)
mkaszewiak/open-xml-docs
Feb 2025 - Apr 2025
Doc repository for the Office OpenXML documentation.
Contributions:12 pushes, 4 branches in 1 month
dotnet/Open-XML-SDK
Dec 2024 - Apr 2025
Open XML SDK by Microsoft
Contributions:1 review, 28 comments, 5 issues in 3 months
xmldocxsdkpptxopen-xml-sdk
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