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Marcel Kemp

PROFILE

Marcel Kemp

Marcel Kemp engineered robust cross-platform security and monitoring features for the wazuh/wazuh repository, focusing on agent development, file system auditing, and build automation. He implemented hot-reload mechanisms, dynamic buffer management, and eBPF-based file event tracking to enhance runtime configurability and data integrity across Linux, Windows, and Solaris environments. Using C, C++, and shell scripting, Marcel addressed kernel version differences, improved packaging workflows, and automated CI/CD pipelines for reliable releases. His work included updating documentation and configuration management to support new OS versions, ensuring accurate integrity checks, and reducing operational risk through careful error handling and compatibility improvements throughout the codebase.

Overall Statistics

Feature vs Bugs

50%Features

Repository Contributions

51Total
Bugs
17
Commits
51
Features
17
Lines of code
7,470
Activity Months12

Work History

October 2025

2 Commits • 1 Features

Oct 1, 2025

October 2025 monthly summary for wazuh/wazuh: Delivered IT Hygiene Windows kernel version inventory data to enhance asset visibility and compliance reporting; updated documentation to reflect current main branch references; aligned release documentation with the 4.14.0 changelog; fixed outdated links to main branch to eliminate drift between code and docs. These changes improve asset management accuracy, onboarding, and developer experience while reducing support friction.

September 2025

5 Commits • 2 Features

Sep 1, 2025

For 2025-09 (wazuh/wazuh), delivered targeted improvements across OS support, security policy coverage, build reliability, CI/CD automation, and documentation to support upgrade planning and cross-architecture deployments. Key outcomes include Debian 13 support via SCA policy and build config updates, reliability improvements to installation scripts to prevent false positives, corrected CI/CD permissions for automated Docker image updates across architectures, comprehensive 5.X agent compatibility documentation, and a Y2K38 safety fix in wcom.c to prevent potential overflow scenarios.

August 2025

2 Commits • 1 Features

Aug 1, 2025

Performance in Aug 2025 focused on CI automation and data integrity for wazuh/wazuh. Key features delivered included an automated CI MacPorts latest release workflow and alignment of package integrity check data to reflect current libraries and configurations. These improvements enhance test reliability, reduce maintenance toil, and improve confidence in release readiness by ensuring tests target the actual installed state.

July 2025

3 Commits • 1 Features

Jul 1, 2025

July 2025 monthly summary for wazuh/wazuh focusing on reliability, runtime configurability, and integrity validation. Key features delivered include a Dynamic Client Buffer Hot-Reload that enables runtime resize/free and in-loop configuration reread in the agent main loop without requiring a restart, and updates to file integrity checks to reflect current file sizes.

June 2025

3 Commits • 1 Features

Jun 1, 2025

June 2025 (wazuh/wazuh) — concise monthly summary focusing on business value and technical achievements. Key features delivered: - Hot-reload support for the Wazuh agent via signal-based reloads and improved execd reconnection to ensure continuous communication with the execd queue. Commit: 5b408e3cec919c83e18b18b1c780faf0a8c75d16. Major bugs fixed: - AIX: Fixed math library linking for wazuh external library by updating the Makefile to correctly link the math library (-lm). Commit: 41c039b5bfcda97fb3e5d50981b2c7b270302a65. - Solaris 11: Fixed SSL CA certificates lookup by explicitly setting CURL_CA_BUNDLE in both build setup and compilation stage. Commit: 06415f1a778dc32134ed54ee5a268bc221408d32. Overall impact and accomplishments: - Increased cross-platform reliability and security: AIX math library link fix prevents runtime math function failures; Solaris CA bundle ensures TLS connections succeed in all environments. Hot-reload and execd reconnection reduce downtime and manual intervention. - Demonstrated end-to-end delivery with clear commit-level traceability. Technologies/skills demonstrated: - Build tooling and Makefile troubleshooting; cross-platform environment configuration; signal-based process control; inter-process communication; TLS certificate handling in build pipelines.

May 2025

2 Commits • 1 Features

May 1, 2025

May 2025 performance highlights for wazuh/wazuh: delivered key features and stability enhancements focused on accurate file system path reporting and cross-platform build reliability. The work improves security visibility, incident investigations, and packaging reliability across kernel versions (6.8.0+) and Solaris 11 environments.

April 2025

4 Commits • 1 Features

Apr 1, 2025

April 2025 monthly summary for wazuh/wazuh: Delivered Oracle Linux 10 Support for Security Configuration Assessment (SCA) and implemented critical stability improvements across builds and data collection. Expanded OS coverage to Oracle Linux 10 by adding configuration files and directory structures and updating build specs and check_files to ensure accurate SCA processing. Addressed runtime and data integrity concerns for older OS variants by aligning eBPF probes with kernel version differences and correcting storage/CSV sizing. These changes improve deployment coverage, reduce build/runtime risk, and ensure reliable data capture across diverse Linux environments. Technologies demonstrated include packaging and build tooling (SPECS), SCA configuration, eBPF kernel integration, and storage/config management.

March 2025

7 Commits • 1 Features

Mar 1, 2025

March 2025: Delivered substantial BPF/eBPF improvements across wazuh/wazuh and robustness updates in wazuh-agent. Implemented source-and-prebuilt BPF build paths, improved libbpf-bootstrap compatibility for older OSes, aligned codebase with C++14, and refactored FIM event handling with double buffering. Added kernel-version-aware eBPF vfs_unlink handling to prevent crashes on newer kernels. Cleaned up test configuration to reflect current FIM expectations. Enhanced post-install cleanup in wazuh-agent with robust error handling to ensure complete, visible failures when removal fails. Overall, these changes improved stability, cross-OS compatibility, and deployment reliability while reducing maintenance overhead.

February 2025

2 Commits • 2 Features

Feb 1, 2025

February 2025: Delivered two high-impact features in wazuh/wazuh that strengthen security posture and audit visibility. No major bugs fixed this month; efforts focused on stability, distro coverage, and packaging. Overall impact includes expanded enterprise Linux coverage, improved forensic capabilities, and smoother deployment workflows. Skills demonstrated include kernel-level auditing with eBPF, enhanced packaging (RPM) and data/config management.

January 2025

15 Commits • 4 Features

Jan 1, 2025

January 2025 performance summary focusing on delivering reliable log ingestion, robust cross-platform release tooling, and policy/workflow improvements with clear business value. Key initiatives included a journald integration for wazuh-agent with cursor-based log positioning and enhanced Linux filtering/testing, broad CI/build tooling improvements to address macOS compilation, permissions handling, and packaging workflows, and policy/packaging enhancements in wazuh to standardize SCA naming, improve file revision checks, and add Fedora 41 support.

December 2024

2 Commits • 1 Features

Dec 1, 2024

December 2024 monthly summary for wazuh/wazuh: Implemented robust CSV path matching for check_files across versions by introducing a global wildcard (*) in file paths. This standardizes path resolution across agent versions and OS configurations, improving data correctness and processing reliability. Addressed cross-version inconsistencies with two bugfix commits to apply the global pattern, ensuring correct matching and processing. Overall, this work enhances reliability of file discovery, cross-platform compatibility, and reduces operational troubleshooting risks.

November 2024

4 Commits • 1 Features

Nov 1, 2024

In November 2024, delivered reliability improvements, security hardening, and documentation alignment across wazuh/wazuh and wazuh/wazuh-documentation. Key outcomes include build reliability on AIX, protection against directory traversal, and synchronized repository references for packaging docs.

Activity

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Quality Metrics

Correctness88.6%
Maintainability88.0%
Architecture84.4%
Performance80.2%
AI Usage21.2%

Skills & Technologies

Programming Languages

BPFBashCC++CMakeCSVDockerfileMakefileMarkdownPlantUML

Technical Skills

Agent DevelopmentBPFBuffer ManagementBug FixBuild AutomationBuild EngineeringBuild SystemsCC++C++ DevelopmentCI/CDCMakeCode MaintenanceConcurrencyConfiguration Management

Repositories Contributed To

3 repos

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

wazuh/wazuh

Nov 2024 Oct 2025
12 Months active

Languages Used

CMakefileMarkdownCSVShellC++yamlCMake

Technical Skills

Build SystemsDocumentationSecuritySystem ConfigurationSystem ProgrammingCI/CD

wazuh/wazuh-agent

Jan 2025 Mar 2025
2 Months active

Languages Used

BashCC++CMakeDockerfileMarkdownShellYAML

Technical Skills

Build SystemsC++C++ DevelopmentCI/CDCMakeConfiguration Management

wazuh/wazuh-documentation

Nov 2024 Nov 2024
1 Month active

Languages Used

RST

Technical Skills

DocumentationTechnical Writing

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