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Melvin RavitonMR

Melvin Raviton

Systems & Security Network Engineer

€450/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Melvin

Passionate about systems, networks, and cybersecurity, I assist companies with their IT administration, technical support, and information system security needs.

My skills cover the administration of Windows, Linux, and macOS environments, network infrastructure management, virtualization, and cybersecurity best practices. I also have knowledge in governance, risk management, and compliance (GRC), data protection, vulnerability assessment, and IT security awareness.

Core Competencies:
• Windows 10/11, Windows Server, Debian, and macOS Administration
• Virtualization: VMware, Hyper-V
• Networks: VPN, access management, network equipment, monitoring
• Cybersecurity: log analysis, phishing campaigns, EBIOS RM, vulnerability management
• Security Tools: SentinelOne, PingCastle, BloodHound, Purple Knight, Graylog, GoPhish
• Monitoring and Management: Nagios, Grafana, GLPI, NinjaOne, SCCM
• Identity and Access Management: Syspass, GPOZaurr
• Databases: MariaDB
• Business Continuity: BCP / DRP

Rigorous, curious, and with a strong analytical mind, I am fully committed to each mission to provide reliable solutions tailored to my clients' needs. I am particularly interested in roles in cybersecurity, systems and network administration, IT support, technical audits, and infrastructure security improvement.

Available for one-off or long-term assignments, remote or on-site.
  • English

    Native or bilingual

Can work on-site
Paris (up to 50km)

Experience

  • COSEM / Ramsay Santé
    Systems & Security Network Engineer
    MEDICAL
    November 2023 - December 2024 (1 year and 1 month)
    Clichy, France
    • Performed risk analyses according to the EBIOS RM methodology
    • Implemented a SIEM (Graylog)
    • Conducted phishing campaigns and trained teams on security best practices
    • Creation and management of PSO (Password Settings Object)
    • Maintenance in operational and security conditions of the IT park (MCO/MCS)
    • Setup of a print server
    Graylog Pingcastle EBIOS RM Risk Analysis Veeam Active Directory
  • Groupe Delcourt
    Assistant Systems & Network Administrator
    CULTURE
    October 2021 - July 2023 (1 year and 9 months)
    Paris, France
    • Configuration and deployment of VPNs
    • Installation and configuration of a password vault (Syspass)
    • Deployment, configuration, and user training for a monitoring tool (Nagios)
    • Antivirus installation and management
    • Incident and request management via GLPI
    • User account creation and Active Directory management
    • Transfer and security of user data
    Nagios Mac OS Debian GLPI VPN
  • Radio France
    Office Maintenance Technician
    PRESS AND MEDIA
    September 2019 - February 2021 (1 year and 5 months)
    Paris, France
    • Configuration, data transfer, and workstation installation
    • Ensure follow-up of installed hardware by updating inventories
    • Use of SCCM, WebExploIT, and AGM tools
    • Perform hardware or process validation tests and write documentation
    • Assist users with the adoption and operation of terminals
    • Participation in the USMT project
    • Participate in relocation interventions occasionally and if necessary, hardware migration or renewal.
    • Consider the network environment for equipment installation
    • Implementation of encryption tools (ZED)
    Windows SCCM USMT ZED

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Education

  • Apple Foundation Program
    Simplon
    2026
    Concevoir un support de présentation clair de son application mobile Maquetter une application mobile Respecter les normes d'interface graphique Travailler en équipe S'exprimer en public pour présenter son travail Exploiter l'IDE Xcode pour gérer son projet Développer l'interface d'une application à un écran Développer l'interface d'une application multi écran en gérant la navigation Développer la logique d'une application mobile à l'aide du langage Swift et de la programmation orientée objet
  • Expert in Digital Security
    Aston
    2024
    LEAD PENTESTER Etudier les différentes phases d'un test d'intrusion de manière fonctionnelle, méthodique et technique Apprendre à utiliser des outils de maintenance TECHNIQUES DE HACKING Créer des charges sur mesure, étude avancée des outils d'exploitation, approfondissement des protocoles faillibles, pivoting TESTS D’INTRUSION AVEC PYTHON Créer des outils personnalisés avec le langage Python et utiliser des bibliothèques pour le test d'intrusion CYBERDÉFENCE Analyser l’état de l'art de la Cyber- défense Utiliser des services pour la protection d'une infrastructure INVESTIGATION NUMÉRIQUE Explorer des méthodes et des techniques d'investigation numérique (Réseau, Windows, Web, etc) SOC SECURITY MANAGER Intégrer un SOC (Security Operations Center) de manière technique, fonctionnelle Etudier les techniques d'analyse GESTION DES RISQUES SI Apprendre ISO 31000, 27005, la méthode EBIOS 2010 et EBIOS Risk Manager avec des études de cas et retours terrains INTRODUCTION À L’ANALYSE DE MALWARE Etudier les bases pour appréhender l'analyse de malware (assembleur, shellcoding), analyse méthodique de l'automatique vers le manuel GESTION DE PROJET & JURIDIQUE Apprendre à utiliser des outils de gestion de projet Etudier les différentes lois liées à la cybersécuritéINTÉGRATION SMSI INTÉGRATION SMSI Mettre en place un système de management de sécurité de l'infor- mation (SMSI) à l'aide de la norme ISO 27001 /27002 DEVOPS SECURITY MANAGER Sécurité du développement pour le DevOps Intégration des outils pour la sécurité de la continuité d'activité PLAN DE CONTINUITÉ (PCA) Étudier la norme ISO 22301 afin d'aborder la création d'un plan de continuité d'activité

Skill set

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