You're seeing this page as if you were . The main menu is still yours, though. Exit from immersion
Marc LerayML

Marc Leray

SI and Cyber Architect

€723/day
Toulouse, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
Back to original language

About Marc

An engineer specializing in cybersecurity and trained in Toulouse, I honed my skills at Sopra Steria and Deloitte before embarking on an entrepreneurial journey in 2025.

I am a technical engineer developing my expertise in two (sometimes combined) areas: industrial information systems security (OT cybersecurity) and the construction - architecture and integration - of sensitive information systems requiring approval (IGI1300, CMMC). I also have substantial experience in cyber risk analysis (EBIOS RM), audit (ISO27001, NIST, IEC62443, NIS1 and 2 frameworks), homologation management, and project management.

I am committed to understanding the business challenges I work on, transparent and adapted communication with stakeholders, fostering discussions that evolve everyone's ideas, and intellectual rigor.

I would be delighted to discuss your needs, contact me!
  • French

    Native or bilingual

  • English

    Fluent

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

Experience

  • Deloitte
    Senior Cyber Consultant
    November 2021 - May 2025 (3 years and 6 months)
    Paris, France
    OT and IT Infrastructure Security: aeronautics and defense, agri-food, digital services, health sectors
    Design of a cyber operational model based on NIST 800-82 and IEC 62443 for 200 factories: definition and deployment of policies, standards, and procedures. Benchmark of security solutions from four vendors and implementation of PoCs with two: Claroty and Nozomi. Design of a standard architecture and guidelines for Claroty deployment in factories. Deployment on pilot sites in Europe, Asia, and North America.
    Starting from scratch, design of a regulated DR information system and integration of various technologies (Dell, VMWare, Palo Alto, Stormshield, Skyhigh, Cisco, Netbackup, ELK, Windows, RHEL, TheGreenBow) according to the defined architecture.

    SSI OT and IT Audits: optics, watchmaking, maritime, transport, hospitality, pharma sectors
    Organizational and technical audits of factories, ships, and headquarters, conducted through interviews, documentary reviews (policies, standards, procedures), and technical assessments in all cybersecurity domains: network scanning and firewall rule review, equipment configuration review, architecture review. Presentation of findings and recommendations to operational teams and executive committees. Development of an OT cyber audit framework (based on NIST, IEC 62443) and construction of a cyber demonstrator for the railway and maritime sectors.

    Management and Sales: OT & IT Infrastructure Security (25 people) Member of the division management team, activity monitoring, coaching and evaluation of junior and senior employees on client assignments. Development of new accounts (~€500k/year) and assistance on priority accounts (>€1M/year). Active participation in cybersecurity-related events (S4, SSTIC, Deloitte and partner events).
    SI Architecture Industrial Cybersecurity Security Audit Risk Analysis Communication
  • Sopra Steria
    Engineer
    February 2020 - November 2021 (1 year and 9 months)
    Study, architecture, and integration of OT cyber solutions: aeronautics
    Design of the architecture (architecture document, flow matrix, hardware and software description) and deployment (infrastructure and application) of Acronis and Octoplant products for backup and restoration of ICS systems (historian, SCADA, HMI, workstations) and OT (Schneider, Siemens, Rockwell controllers). Integration of Greenbone Security Management (vulnerability scanner): automated deployment of a Red Hat Linux infrastructure using Ansible. Benchmark and Proof-of-Concept of anti-malware technologies adapted to industrial systems (TXOne Stellar, CarbonBlack, Tyrex).

Recommendations

Be the first to recommend Marc

Help this freelancer shine by sharing your experience working together.

These freelancer profiles also match your criteria

AgathaA

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

2

BaptisteB

Baptiste Duhen

Fullstack developer

4.6

(4)

5

AmedA

Amed Hamou

Senior Lead Developer

4

(2)

7

AudreyA

Audrey Champion

Web developer

4.3

(3)

4

Education

  • PASSI-Organizational and Physical Scope, Architecture) GICSP (Global Industrial Cybersecurity Professional), SANS AWS Solutions Architect - Associate Palo Alto Networks PSE: SASE CyberArk Defender and Sentry
    PASSI-portéesOrganisationnelet Physique,Architecture) GICSP (Global Industrial CybersecurityProfessional),SANS AWSSolutionsArchitect-Associate PaloAltoNetworksPSE:SASE CyberArkDefenderandSentry
  • Engineering degree, specialization
    Department of Digital Sciences.
    2020
    Diplôme d'ingénieur, spécialité

Categories