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Jonathan Devere-Ellery

PROFILE

Jonathan Devere-ellery

Jonathan contributed to MicrosoftDocs/defender-docs and Azure/Azure-Sentinel, focusing on security engineering and documentation quality. He delivered features such as geographic visualization of phishing detections and enhanced SVG attachment threat detection in Azure Sentinel, using KQL and YAML to improve threat monitoring and incident response. In defender-docs, Jonathan updated PowerShell-based antivirus guidance and corrected KQL query examples, ensuring documentation accurately reflected product behavior and reduced user confusion. His work emphasized maintainability, clarity, and traceability, with careful version control and comprehensive content updates. By aligning documentation with evolving security practices, Jonathan improved usability and reliability for security administrators and end users.

Overall Statistics

Feature vs Bugs

67%Features

Repository Contributions

12Total
Bugs
2
Commits
12
Features
4
Lines of code
208
Activity Months4

Work History

July 2025

4 Commits • 1 Features

Jul 1, 2025

July 2025: Delivered two key Defender Docs updates with measurable improvements in guidance quality and coverage. Key features: (1) Corrected threat filtering guidance in advanced hunting queries by updating the KQL casing from 'ThreatTypes' to 'Threat Types' to ensure phishing threat filters work as intended, with traceable change in docs (commit 8e2aa0beffac6981b55db4b949e4c3aa7df3541a). (2) Expanded Defender Antivirus guidance to include an alternative workflow using DefenderEval Get-DefenderEvaluationReport alongside Get-MpPreference, accompanied by comprehensive doc updates (commits aaa74b4da02d7bd19e55a291bb7f6a5ed9523053, 65ef2e5d415eb1dae9121ce9ae9c675c03470de9, d21cc02b84d28d5af109b00e44585d96f631a66b). Major bugs fixed: aligned documentation examples with actual product behavior to prevent misinformation about inbound email phishing threat filtering. Overall impact and accomplishments: improved documentation accuracy and reliability for security admins, widened coverage of Defender Antivirus workflows, reducing potential support queries and increasing user trust. Technologies/skills demonstrated: KQL/query validation, PowerShell Defender tooling (Get-DefenderEvaluationReport, Get-MpPreference), documentation authoring and Learn Editor workflows, and strong change traceability.

June 2025

4 Commits • 2 Features

Jun 1, 2025

June 2025: Delivered two core features in Azure Sentinel to boost threat visibility and detection coverage. Implemented geographic visualization of phishing/spam detections through delivery-location pie charts and enhanced SVG attachment threat detection with an optional SenderDisplayName filter. Documentation updates accompany feature changes to improve usability. No major bugs fixed were recorded in this period. Business value: improved monitoring, faster incident response, and broader detection coverage.

April 2025

2 Commits • 1 Features

Apr 1, 2025

April 2025 monthly summary: Delivered a targeted Defender Docs update for Microsoft Defender Antivirus using PowerShell, focusing on accuracy, clarity, and consistency. Content revisions were implemented via two commits to microsoft-defender-antivirus-using-powershell.md, enhancing maintainability and reducing potential user confusion. No major bugs fixed this month; emphasis on documentation quality and long-term supportability.

January 2025

2 Commits

Jan 1, 2025

January 2025: Defender docs quality improvements in MicrosoftDocs/defender-docs. Delivered documentation-only changes focused on accuracy and clarity: corrected a typo ('IPS' to 'IPs') in indicator-ip-domain.md and updated the content to reflect current behavior. These updates reduce user confusion, shorten onboarding, and lower support queries by ensuring the documentation matches product behavior. Maintained strong version-control hygiene with two commits for traceability.

Activity

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Quality Metrics

Correctness98.4%
Maintainability98.4%
Architecture98.4%
Performance98.4%
AI Usage20.0%

Skills & Technologies

Programming Languages

MarkdownYAML

Technical Skills

Azure SentinelContent ManagementDocumentationKQLMicrosoft Defender for Office 365Security EngineeringThreat Detection

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

MicrosoftDocs/defender-docs

Jan 2025 Jul 2025
3 Months active

Languages Used

Markdown

Technical Skills

Documentation

Azure/Azure-Sentinel

Jun 2025 Jun 2025
1 Month active

Languages Used

YAML

Technical Skills

Azure SentinelContent ManagementDocumentationKQLMicrosoft Defender for Office 365Security Engineering

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