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Stephan A.SA

Stephan A.

Expert Cybersecurity & IT Resilience

€900/day
Paris, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Stephan

Cybersecurity expert with over 20 years of experience in critical infrastructure security, specializing in the design and implementation of transformational security strategies within large, regulated financial groups.
Recognized for the ability to lead complex strategic programs, translate business requirements into robust technical architectures, and ensure compliance in multi-regulated environments (DORA, NIS2, LPM, NIST, ISO27001/27002).
With advanced training in cybersecurity (MBA Cybersecurity Management and expertise in economic intelligence) and strategic certifications, I master end-to-end Zero Trust architectures, digital identity frameworks, and enterprise security governance. Proven experience in co-designing transversal architecture standards, evaluating emerging solutions, and leading group-wide security maturity transformations.
I am trilingual in English, French, and Spanish, with proven international mobility and excellent writing and presentation skills for both technical and non-technical stakeholders (Executive Committee, business lines, regulators).
  • French

    Native or bilingual

  • English

    Fluent

  • Spanish

    Fluent

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

Experience

  • Orange Cyberdefense
    Cybersecurity Consultant Manager
    CONSULTING AND AUDITS
    October 2024 - June 2025 (8 months)
    92000 Nanterre, France
    • Client operations management support: Cybersecurity infrastructure audit, maturity assessment, operational resilience strategy definition.
    • Operational transformation program management: Scoping engineering and critical services operations; technical team support; standards alignment.
    • Network/Cybersecurity/Services expertise: Infrastructure architecture consulting; security standards; operational modes.
    Cybersecurity Audit Digital Transformation ISO 27001 IT Architecture
  • Société Générale
    Senior Manager IT Cybersecurity & Resilience
    BANKING AND INSURANCE
    January 2010 - January 2024 (14 years)
    Paris, France
    • Critical infrastructure engineering and operations management: Direct management of 42 employees (4 sites: Paris, Montreal, New Jersey, Bangalore); coordination of distributed teams; technical team expertise and experience support in network, cybersecurity, and application services.
    • Operational strategy & implementation: Definition of infrastructure modernization strategy (Cloud Native, Move2Cloud, DevSecOps); deployment of strategic plans within the operations department; compliance with standards (ISO 27001, PCI-DSS, LPM, DORA).
    • Service operating models & interfacing: Implementation of standardized RUN processes (runbooks, escalation, governance); activity management.
    • Budget and resource management: Management of €15M/year budgets; optimization of resources for service quality improvement; human resource management (recruitment, development, retention); administrative follow-up of supplier contracts.
    • User service contract development: Definition of critical service SLAs (infrastructure, networks, cybersecurity); monthly KPI/KRI reporting; governance steering committees (CoStrat, CoPil, SteerCo, OpCo, CoRisk).
    • Continuous improvement: Operations assessment (automation, resilience, cost); identification of optimization levers; change management.
    • Crisis and emergency management: 24/7 availability for critical situations; P1 incident management (MTTR <1h); contingency and business continuity plan (BCP/DRP).
    Change and Transformation Management Change Management Project Management Cloud Platforms and Infrastructure IT Strategy
  • Hewlett-Packard (EMEA)
    IT Operations Manager / Shift Manager
    TELECOMMUNICATIONS
    January 2004 - January 2010 (6 years)
    Barcelona, Spain
    • Direction of distributed operational teams: Direct management of 34 specialists; 2x12h shifts; coordination of 180 indirect engineers; reduction of P1 incidents by 60%.
    • Infrastructure engineering and operations: L2/L3 support (Unix/Windows/RDBMS/SAP/Network/Cybersecurity); 99.2% availability SLA; client BCP/DRP architecture.
    • Standard operating procedures: Incident, change management processes (ITIL v3); ISO 27001 audit; zero major non-conformity.
    • Budget and service management: Supplier procurement monitoring; maintenance contract management; executive service quality reporting.
    Change Management Change and Transformation Management Team Management Incident Management Security Operations Center (SOC)

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Education

  • MBA Management
    School of Economic Warfare
    2022
    MBA Management
  • Computer Systems Engineer
    CESI Toulouse
    2002
    Ingénieur Systèmes Informatiques

Skill set

Categories