Silvere Megelas
IT Security Specialist (Consultant)
Experience
IT Security Specialist (Consultant)
EU Court of Justice
- Developed incident-response and investigative operating procedures to improve repeatability, auditability, and CSIRT escalation quality.
- Delivered centralized Splunk dashboards for firewall and identity telemetry, accelerating triage and improving evidentiary context during incidents.
- Strengthened identity assurance for sensitive services via Kerberos and SAML-based SSO patterns, reducing authentication risk in critical workflows.
- Automated security operations using Ansible and Terraform to reduce configuration drift and support post-incident reconstruction and compliance reviews.
Security Architect (Consultant)
European Commission
- Created standardized documentation sets (HLD/LLD, procedures, runbooks) to align security operations across multiple teams and stakeholders.
- Designed DDoS mitigation architectures and operational response steps aligned with EU threat models and incident lifecycle requirements.
- Implemented consistent firewall/WAF automation (APIs, Terraform, templating) to enable controlled changes and faster response to evolving threats.
- Built and refined Splunk Enterprise/ES detection use cases to expand coverage and reduce mean time to detect and scope incidents.
IT Security Specialist (Consultant)
EU-LISA
- Built investigation-grade threat-hunting dashboards in Splunk using custom SPL and multi-source correlation for rapid scoping and hypothesis testing.
- Integrated MISP threat intelligence into SIEM workflows and documented ingestion, enrichment, and analyst usage procedures.
- Engineered and upgraded Splunk Enterprise and ES infrastructure at scale, improving reliability and retention for forensic and compliance needs.
- Conducted security testing and produced structured findings and remediation guidance, feeding lessons learned and continuous control improvement.
Cybersecurity Engineer (Consultant)
European Union Aviation Safety Agency
- Owned end-to-end security operations including incident response coordination, investigative support, and executive reporting for leadership decision-making.
- Defined repeatable response playbooks and escalation patterns across SOC, IT, and business stakeholders to reduce ambiguity under pressure.
- Supported digital forensics activities (scope definition, acquisition coordination, preservation, reporting) and ensured defensible documentation trails.
- Improved readiness through vulnerability research and risk-based security architectures (WAF, IAM, reverse proxies) aligned with threat scenarios.
Security Consultant
NATO
- Provided L2/L3 security operations support for mission-critical platforms, strengthening escalation discipline and incident communications.
- Delivered runbooks and operational procedures to standardize recurring security tasks and reduce operational variance across shifts.
- Executed zero-downtime migrations of security infrastructure with rollback planning, change control, and post-change verification checklists.
- Coordinated with multinational teams to ensure process adoption and consistent operational outcomes in high-availability environments.
Senior Security Engineer / Architect
Euroclear
- Architected and migrated large-scale financial security infrastructures (F5 VIPRION, Check Point VSX) with strict availability and audit requirements.
- Implemented robust authentication patterns (SAML IdP/SP) and documented operating procedures for secure access across global platforms.
- Led Prince2 security projects, managing stakeholders, schedules, and budgets while maintaining operational continuity.
- Automated traffic analysis and reporting (iRules/Perl) to improve triage visibility and support incident governance and evidence preservation.
Network & Security Architect
Natixis; Société Générale; NYSE Euronext; BNP Paribas; IBM; Nokia Siemens Networks
- Designed and secured global banking and trading infrastructures under extreme scale/latency constraints, including HA routing and segmentation patterns.
- Established durable security standards and operational documentation adopted across teams, improving consistency and auditability over time.
- Led international migrations and 24/7 operational support transitions with clear escalation paths and repeatable procedures.
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Banking and Finance (15 years), Information Technology (14.5 years), Government and Administration (8 years), and Aerospace and Defense (4 years).
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Information Technology (23.5 years), Operations (15 years), and Project Management (2 years).
Summary
Staff-level cybersecurity consultant with 20+ years of experience securing large-scale, mission-critical environments across financial services, government, aviation, and defense. Deep expertise in cloud and network security architecture, zero trust, SIEM/SOC, threat hunting, incident response, and security automation. Proven record delivering FAANG-scale systems: high availability, automation-first, measurable risk reduction, and executive-level reporting. Harvard-certified, Splunk ES expert, and cyber investigations specialist.
Skills
Incident Management Lifecycle (Triage, Containment, Eradication, Recovery, Lessons Learned)
Digital Forensics Process Design (Chain Of Custody, Preservation, Acquisition Coordination, Reporting)
Csirt Documentation (Handbooks, Playbooks, Runbooks, Sops)
Forensic Readiness (Logging Strategy, Retention, Access Control, Auditability)
Siem/soc Engineering (Splunk Enterprise/es, Detections, Threat Hunting)
Security Automation (Apis, Ansible, Terraform)
Vulnerability Management Testing
Standards Familiarity (Iso 27035/27037 Concepts, Nist, Sans)
Training And Knowledge Transfer
Methods: Chain Of Custody, Evidence Preservation, Acquisition Coordination, Hashing/verification, Log Preservation, Timeline Analysis, Post-incident Reviews
Platforms: Splunk Enterprise/es, Misp, Ansible, Terraform, Kali, Burp Suite, Nessus, Qualys; Maltego, Autopsy And Encase, Custom Osint Python Script; Network/security Platforms Including Check Point, Fortinet, Nginx Plus; Identity Protocols Kerberos And Saml
Managed And Mentored Teams Of Up To 10 Engineers
Regularly Interfaced With Cisos, Legal Teams, And Law Enforcement
Recognized For Precision, Resilience, And Executive-level Communication In High-pressure Environments
Languages
Certifications & licenses
CCNP, CCNA, Network+
Cisco/CompTIA
Certified Expert In Cyber Investigation, Cyber Intelligence, Digital Forensics
McAfee Institute
Harvard Kennedy School Certificate In Generative AI
Harvard Kennedy School
HarvardX Professional Certificates: Cybersecurity Risk Management; Leadership And Team Success
HarvardX
Nessus, Autopsy, And Qualys Penetration Testing Certifications
Splunk Enterprise And Enterprise Security Administration
Profile
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