🤺 Hadrien CHAUDER

Junior Offensive Security Engineer @ Swiss Post Cybersecurity

About

💼 Junior offsec engineer at Hacknowledge / Swiss Post Cybersecurity in Luxembourg 📜Certifications : - CPTS - PJPT 🧪 ProLabs : - Offshore - POO - Zephyr - Dante Cool stuff : https://hadrien.cat/

Country

City

Luxembourg

Industry

Computer & Network Security

Skill

Recherche et développement (R et D), Reporting, Exploiting Obscure and Real-World Active Directory Flaws, Lateral Movement and Crossing Trust Boundaries, Pentest Active Directory, Pentest Web, Rédaction technique, Active Directory, Revue de code, Analyse des risques, Windows Server, Documentation, Pivoting, Password Cracking, Active Directory enumeration and attacks, Lateral movement, Local privilege escalation, Situational awareness, Web application enumeration and attacks, Enumeration

Experience

Junior Offensive Security Engineer

Swiss Post Cybersecurity

2025-11 - Present · 11 mos

Luxembourg

Pentest Web Reporting R&D Project

Systems Administrator

4MURS

2022-10 - 2025-9 · 3 yrs

Marly, Grand Est, France

Active Directory Security & Migration - Led AD migration project following comprehensive security audit - Utilized PingCastle, Purple Knight, and BloodHound for AD security assessment - Identified and remediated Active Directory vulnerabilities and attack paths - Implemented secure AD architecture based on audit findings - AD Hardening Cyber Resilience Projects - Conducted IT risk assessments and vulnerability analysis - Mapped business applications and data flows across enterprise systems - Interviewed application managers to document security requirements - Applied ANSSI cybersecurity standards and produced compliance reports IT Infrastructure Monitoring - Implemented monitoring solutions for network, systems, and business applications - Built Grafana dashboards and configured Zabbix monitoring templates - Set up alerting systems and provided Level 2 technical support - Managed SLA reporting and high-availability service implementation - Supervised IT operations across 100+ retail stores Project Management - Tracked projects using Gantt charts and Kanban boards - Performed risk analysis and defined performance metrics - Created technical documentation and RACI responsibility matrices

IT Support Technician

4MURS

2021-6 - 2021-7 · 2 mos

Marly, Grand Est, France

End-User Support & IT Operations - Configured and deployed user workstations and peripherals - Managed IT asset inventory and equipment lifecycle - Set up and maintained network printers across multiple locations - Provided technical support and troubleshooting for end users