Jérôme Léonard

Paris, Ile-de-France

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Summary

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Rockstar

Jérôme Léonard is a cyber threat intelligence specialist with nearly 17 years in information security and nine years of focused professional experience, based in Paris. He leads CTI activities and brings deep hands-on expertise in threat hunting, malware and memory analysis, digital forensics, incident response, and secure infrastructure design. Jérôme is an active open-source contributor on TheHive Project’s Cortex and Cortex-Analyzers, where he developed and hardened MISP module integration and improved Nessus analyzer reporting and presentation. His work combines operational incident handling with tooling improvements that make threat intelligence workflows more automatable and auditable. He also teaches information security courses, demonstrating a commitment to knowledge sharing and operational maturity.

9 years of coding experience

Github Skills (15)

enterprise-integration10

json10

application-integration10

integrate10

cloud-integration10

python10

system-integration10

integrations10

data-integration10

api-design9

api9

apim9

cyber-threat-intelligence8

open-source7

incident-response6

Programming languages (11)

DockerfileShellCSSGherkinScalaSCSSJavaScriptPHP

Github contributions (5)

TheHive-Project/Cortex-Analyzers

Jan 2017 - Nov 2022

Cortex Analyzers Repository

Role in this project:

Back-end Developer

Contributions:14 reviews, 926 commits, 160 PRs in 5 years 11 months

Contributions summary:Jérôme's contributions primarily focused on the implementation of new features and functionality within the Cortex Analyzers repository, specifically related to integrating the Nessus vulnerability scanner. They merged branches, potentially incorporating new functionality, and modified the long report templates by fixing display issues with progress bars and colors. These changes involved updating templates, which suggests a focus on the presentation and integration of vulnerability data within the system. Furthermore, the user added and changed the summary() function and updated other short reports templates to use a taxonomie, revealing expertise in data presentation and possibly reporting.

cortexpythoncyber-threat-intelligencedfirincident-response

TheHive-Project/Cortex

May 2017 - Feb 2021

Cortex: a Powerful Observable Analysis and Active Response Engine

Role in this project:

Back-end Developer

Contributions:13 commits, 13 pushes, 1 branch in 3 years 10 months

Contributions summary:Jérôme primarily focused on developing and refining a module loader for the Cortex project, specifically for integrating with MISP modules. Their commits demonstrate the creation and modification of a Python script (`misp-modules-loader.py`) to load and execute MISP modules, manage module paths, and handle input/output using JSON. The user improved functionality by adding listing capabilities, information retrieval, and handling JSON serialization/deserialization to address errors. These changes collectively enhanced the integration capabilities of Cortex with external threat intelligence modules.

cortexpythondfirengineobservable

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