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Julien CharbonnelJC

Julien Charbonnel

Cybersecurity Expert | DevSecOps & Pentest

€650/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Julien

Cybersecurity Expert/PenTest & ISO27001 Compliance

Hello,
I am a cybersecurity specialist and pentester with several years of experience in auditing, penetration testing (PenTest), and supporting information system compliance.
My goal: To help you anticipate cybersecurity risks, protect your sensitive data, and strengthen your organization's security.

I can perform all or part of the following services:

  • Penetration testing (PenTest)
  • Technical and organizational security audits
  • Compliance with ISO27001 standard (initial audit, action plan, certification support)
  • Cybersecurity support for GDPR compliance
  • Risk analysis
  • Review and implementation of security policies
  • Securing Systems and Networks
  • Cybersecurity training and awareness
  • pentest
In my role as a cybersecurity expert and pentester, I support small and medium-sized businesses as well as large corporations, always with a pragmatic, clear, and results-oriented approach.

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pentester
Pentest
IT Security
cybersecurity expert
cybersecurity
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Ministère des Armées
    Cybersecurity Expert
    PUBLIC SECTOR
    January 2023 - February 2024 (1 year and 1 month)
    Paris, France
    1. Threat Monitoring and Detection:
    - Continuously monitor the ministry's systems and networks to detect threats and suspicious activities.
    - Utilize advanced monitoring tools (SIEM) to identify and analyze security incidents.

    2. Security Incident Management:
    - Respond quickly to security incidents by following established protocols.
    - Analyze incidents, isolate affected systems, and take remediation measures to restore security.
    - Document incidents and responses in detailed reports to improve future incident responses.

    3. Protection of Classified Systems:
    - Implement and manage specific security measures to protect classified information.
    - Ensure that systems and networks meet national and international security standards.

    4. Risk and Vulnerability Assessment:
    - Conduct regular risk assessments and vulnerability analyses on critical systems and infrastructures.
    - Use vulnerability scanning tools to identify potential weaknesses and recommend corrective actions.

    5. Network and Infrastructure Security:
    - Implement and manage security devices such as firewalls, IDS/IPS, and network access control solutions.
    - Implement security protocols to protect sensitive communications (encryption, VPN).

    6. Development and Implementation of Security Policies:
    - Develop, update, and enforce the ministry's information security policies, standards, and procedures.
    Cybersecurity Cybersecurity Cybersecurity Awareness Risk Assessment Vulnerability Management Vulnerability Management Security Policy Security Incident Management Cybersecurity Audit Pentester
  • Wardeners
    Cybersecurity Expert
    July 2024 - Today (1 year and 11 months)
    PRESIDENT & FOUNDER OF WARDENERS
    We protect, detect, and neutralize all threats to your business. We secure your company at every level:


    1. Security Audit and Diagnosis
    -Analysis of your IT infrastructure, networks, and data.
    -Penetration tests to see what a hacker could exploit.
    -Detailed report with weaknesses and solutions to implement.


    2. Implementation of Protection Solutions
    -Network security (firewalls, VPNs, access segmentation).
    -System hardening (encryption, two-factor authentication, access management).
    -Sensitive data protection (backups, encryption, anti-ransomware).


    3. 24/7 Monitoring and Response
    -Immediate detection of suspicious activities.
    -Rapid response in case of incident (threat isolation, remediation).
    -Continuous reports and alerts to keep you informed without stress.


    4. Attack Simulation and Penetration Testing
    -Pentesting to simulate a real hacker.
    -Phishing scenarios to see if your employees are vulnerable.
    -Corrections and improvements before a real hacker does.


    5. Training and Awareness
    -Training against phishing and the most common attacks.
    -Awareness of best practices (passwords, email usage, secure browsing).
    -Crisis simulations for effective response in case of attack.

    Pentester Cybersecurity Cybersecurity Awareness cybersecurity training Pentesting
  • BVA
    Cybersecurity Expert
    RESEARCH
    February 2024 - July 2024 (5 months)
    1. Risk and Vulnerability Analysis:
    - Conduct regular security risk assessments and vulnerability analyses on the company's systems and networks.
    - Use vulnerability scanning tools (Nessus, OpenVAS) to identify potential weaknesses.

    2. Penetration Testing (Pentesting):
    - Plan and conduct penetration tests to assess the resilience of systems and applications to external and internal attacks.
    - Write detailed reports on findings and provide recommendations for risk mitigation.

    3. Security Incident Management:
    - Monitor security systems to detect incidents and anomalies.
    - Respond quickly to security incidents by analyzing causes, containing threats, and remediating detected vulnerabilities.
    - Document incidents and responses in post-incident reports.

    4. Implementation of Security Policies and Procedures:
    - Develop and update information security policies, standards, and procedures.
    - Ensure compliance of security practices with industry regulations and standards (ISO 27001, GDPR).

    5. Securing Systems and Networks:
    - Configure and manage security devices such as firewalls, IDS/IPS systems, and VPNs.
    - Implement security measures to protect internal networks against intrusions and DDoS attacks.

    6. Application Security:
    - Collaborate with development teams to integrate security best practices into the software development lifecycle (Secure SDLC).
    - Conduct code reviews and security analyses to identify and fix vulnerabilities.
    Cybersecurity Cybersecurity Cybersecurity Awareness Vulnerability Management Vulnerability Scan Risk Analysis Security Audit Pentester

Recommendations

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Aurelien Vol and 3 other people have recommended Julien

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Education

  • Bachelor of Cybersecurity
    UPEC
    2024

Skill set

Categories