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Simon ConstantSC

Simon Constant

Freelance Cybersecurity & IT | Web/Infra Pentest |

€400/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Simon

Freelance in cybersecurity and IT, specializing in offensive security, technical auditing, and automation.
- Master's in Computer Security at ESGI
- Bachelor's in Computer Security at ESGI
- Currently in CPTS training.

I support SMEs, startups, and freelancers in:

identifying and correcting security vulnerabilities
securing their servers and infrastructures
implementing best practices (hardening, segmentation, monitoring)
developing internal scripts and tools (Python, Bash, PowerShell)
automating technical tasks and CI/CD

I favor a pedagogical, transparent, and results-oriented approach. Each mission includes a clear report, concrete recommendations, and support tailored to the client's technical level.

Available for:

security audits
light pentests
Linux/Windows hardening
automation / scripting
advanced IT support
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Kyndryl Paris
    Cybersecurity Engineer
    January 2022 - January 2025 (3 years)
    • • Incident response and SOC operations (Level 2/3)
    • • Investigated alerts from Microsoft 365 Defender and Sentinel
    • • Hardened Windows Server and Linux environments (CIS benchmarks, NIST, ANSSI, OWASP guidelines)
    • • Automated security tasks using Python and PowerShell
    • • Performed internal penetration testing on Linux, Active Directory and Microsoft 365 setups
    • • Conducted log analysis, correlation, and threat hunting
    • • Participated in post-incident remediation (containment, recovery, documentation)
    Cybersecurity Vulnerability Assessment
  • Streamvision,
    Systems Technician
    January 2020 - January 2022 (2 years)
    Paris, France
    • • Installed and maintained DVB server infrastructure
    • • IPTV middleware maintenance
    • • Developed and maintained professional web applications
    • • Contributed to the EU H2020 SMART‑BEAR project, working on connected medical devices and large‑scale clinical deployment
    • • Participated in the development of the BearPack logistics platform (device pairing, kit automation, tracking)
    • • Worked on the Electron‑based software used to configure medical sensors and onboard patient devices

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Education

  • General Literary Baccalaureate
    Lycée Evariste Galois Noisy le grand
    2018
  • Professional Baccalaureate in Connected Environments Professions
    Les Compagnons du Devoir Bordeaux Aquitaine
    2020

Certifications

Skill set (13)

Categories