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Marcello MendoncaMM

Marcello Mendonca

Senior Cybersecurity Engineer

€850/day
Rotterdam, NL
15+ years

Average response time: 1 hour

About Marcello

Cybersecurity leader with over 20 years of experience leading information security programs across critical infrastructure, digital platforms, and global enterprises. Proven record as Head of Cybersecurity and DPO in complex, regulated industries, with strong leadership across SOC, DevSecOps, GRC, Offensive Security and Cloud Security. Adept at advising C-level stakeholders, building high-performing security teams, and embedding security into cloud transformations and customer-centric digital strategies. Trusted for crisis leadership, regulatory compliance (GDPR, ISO 27001, PCI-DSS), and large-scale risk management.
  • German

    Native or bilingual

  • Spanish

    Fluent

  • Portuguese

    Native or bilingual

  • French

    Conversational

  • English

    Fluent

Can work on-site
Rotterdam (up to 50km), Amsterdam (up to 50km)

Experience

  • IV group
    Senior OT Cybersecurity Engineer
    ENERGY AND UTILITIES
    January 2026 - Today (5 months)
    Rotterdam, Netherlands
    - IEC 62443 (Implementation, Audit, Cyber FAT, Architecture review), OT Security,

    - Designing the target security architecture for software development and deployment covering: malware and supply-chain risk controls; integrity verification and versioning; secure distribution to production OT environments; site connectivity and segmentation between IT, cloud and OT.

    - Ensuring alignment with industrial security standards and best practices for OT and manufacturing environments (e.g. defense-in-depth, zone and conduit models, and industrial cybersecurity frameworks).

    - Defining identity, access, integrity, monitoring and operational controls for PLCs and robotic systems across development, staging and production.

    - Designing the operational model for rollout, lifecycle management, patching, incident handling and audit readiness.
    OT Cybersecurity IEC 62443 Cybersecurity Audit IAM Architecture review
  • Samsung SDS LATAM
    Head of Cybersecurity LATAM & DPO
    June 2022 - Today (4 years)
    • Led multi-disciplinary security teams across SOC, Cloud Security, OT, Red Team, and DevSecOps.
    • Designed and implemented security architecture for Samsung Cloud & AWS.
    • Implemented global DevSecOps program (IEC 62443), improving delivery and security.
    • Governed IAM and PAM solutions with CyberArk; automated threat detection processes.
    OT Cybersecurity DevSecOps AWS Security Cybersecurity Leadership
  • Siemens energy
    Cybersecurity Specialist
    August 2021 - June 2022 (10 months)
    • Managed OT SOC operations for 47 plants globally.
    • Deployed Azure Sentinel; led DevSecOps program across multiple countries.
    • Responded to and analyzed ransomware attacks using forensic methodologies.

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Education

  • MBA in Project Management
    Pitágoras Unopar
    2022
    MBA in Project Management
  • Bachelor of Management
    UniFG
    2015
    Bachelor's in ICT Management

Skill set

Categories