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Franck JeanFJ

Franck Jean

Network Security Engineer

€650/day
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Franck

with over 8 years of experience in network security and administration. Passionate
by new technologies, I have solid expertise in designing network architectures and deploying security solutions to protect data against emerging threats.
With excellent interpersonal skills and a team spirit, I am recognized for my ability to collaborate effectively with different stakeholders and to adapt quickly to technological innovations.
Motivated by continuous learning, I ensure my skills are up-to-date to meet the growing demands in cybersecurity.
  • French

    Native or bilingual

  • English

    Conversational

  • Russian

    Conversational

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

Experience

  • SPIE Opérations
    Security and Network Engineer
    ENERGY AND UTILITIES
    May 2025 - Today (1 year and 1 month)
    Cergy, France
    Responsibilities
    Maintenance in Operational Condition (MCO) of the Information System, ensuring
    availability, performance, and security.
    Level 2/3 Incident Management: diagnosis, resolution, and tracking of complex problems impacting production.
    Supplier Management and Steering Committee (COPIL) facilitation.
    Writing and updating technical documentation to ensure traceability and compliance.
    Execution of technical remediation plans in collaboration with SECOPS (Cybersecurity) teams.
    Participation in workshops, technical validations, and strategic projects (version upgrades, configuration hardening, security).
    Contribution to cybersecurity and network-focused technical projects.
    On-call duty and scheduled interventions to ensure service continuity.
    Technical Environment
    Zscaler (ZIA, ZPA): incident management, security policy administration, user rights management, Proxy Pac management.
    Fortinet Firewalls (FG500E, FG1100E, FG100E): rule creation/modification, incident management, access configuration via IPSEC tunnels and FortiClient VPN.
    Palo Alto (PA-320): security rule administration and incident resolution.
    F5 BIG-IP LTM: node, pool, virtual server administration, SSL certificate management.
    IPAM (EfficientIP): internal DNS, DHCP, and IPAM planning management.
    Nameshield: external DNS management.
    Citrix Netscaler: supervision, incident management, participation in monthly steering committees, version upgrade monitoring.
    PRTG: proactive network supervision.
    Fortinet Zscaler IPAM Palo Alto Networks F5 LTM
  • RATP,
    Security and Network Engineer
    TRANSPORTATION
    November 2019 - May 2025 (5 years and 6 months)
    Noisy-le-Grand, France
    Achievements and Responsibilities
    Security – Checkpoint (Gaia R77.30, R80.40, R81.20)
    Security policy administration via Check Point SmartConsole: updating, configuration, and hardening of rules on firewalls.
    Audit and remediation: conducting quarterly audits of user accounts and cleaning up policies on critical systems.
    Incident Management: proactive and corrective maintenance of firewalls to
    guarantee availability and compliance.
    DDI (DNS-DHCP-IPAM) Management – SolidServer 1100
    Network administration: creation, modification, and deletion of IP addresses, DNS records, aliases, and DHCP lease management.
    Version upgrades and updates: monitoring DDI component evolution and applying patches.
    Support and security: user rights management and resolution of incidents related to DDI services.
    WiFi Infrastructure
    Deployment and configuration of Aruba access points (AP207, AP303, AP505, AP518, AP515) on various sites.
    WiFi controller administration: management and maintenance of Alcatel
    OAW-4750XM controllers and supervision via OmniVista 3600.
    LAN Network
    LAN equipment administration: Cisco, Alcatel, and HP switches and routers.
    Modernization and deployment: validation of technical documentation, monitoring of commissioning.
    Level 3 Support: resolution of network and security incidents.
    Technical Environment
    Security: Checkpoint Gaia (R77.30, R80.40, R81.20)
    Network and WiFi: Cisco (2900, 6509, C9500), Alcatel (6450, 6560, 6860), Aruba (AP207,
    AP303, AP505, AP518, AP515), Alcatel OAW-4750XM, OmniVista 3600
    DDI: SolidServer 1100 (EfficientIP)
    Wifi Checkpoint IPAM Cisco Alcatel
  • Orange Business Service,
    Network Engineer
    TELECOMMUNICATIONS
    January 2018 - October 2019 (1 year and 9 months)
    Bagnolet, France
    Achievements and Responsibilities
    • Level 1 / Level 2 Technical Support: Provided first and second level support for managing network incidents affecting major Orange Business Services clients. Intervened on complex problems to ensure rapid service restoration.
    • Remote Problem Resolution: Diagnosed incidents and provided remote assistance to clients, offering tailored technical support to resolve network issues.
    • Telephone Support: Provided real-time assistance to clients, including personalized telephone support to address urgent and complex requests.
    • Customer Relationship Management: Proactive communication with clients during incident handling to ensure optimal satisfaction and transparency throughout the resolution process.
    • Proactive Network Architecture Supervision: Continuous monitoring of network architectures to identify and anticipate potential problems, enabling proactive incident management.
    • Diagnosis and Service Restoration: Used diagnostic tools to identify root causes of incidents and rapidly implemented corrective solutions for effective service restoration. Technical Environment
    • Technologies: Cisco, OneAccess, Juniper
    Cisco Alcatel Juniper Customer service LAN/WAN

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Education

  • Master of Science in Administration
    University of Reims Champagne Ardenne
    2017
    Master 2 Administration Systèmes et Sécurité Réseaux
  • Master of Science in Administration
    University of Reims Champagne Ardenne
    2016
    Master 1 Administration Systèmes et Sécurité Réseaux

Certifications

Skill set (15)

Categories