Head of IT · PhD · Cybersecurity Consultant

Securing critical
infrastructure
at national scale.

nmarangos@info ~ whoami
$ cat profile.json
{
  "name": "Dr. Nikolaos Marangos",
  "title": "Head of IT · Greek Ministry of Education",
  "consultant": "Cybersecurity · CVC Advisers S.A.",
  "phd": "Cloud Forensics · University of the Aegean",
  "experience_yrs": 10+,
  "location": "Athens · Greece"
}
$
// 01 · About
Senior technology leader.
Academic. Builder of resilient systems.

Senior Technology and Cybersecurity Leader with a proven track record in delivering enterprise-scale infrastructure, cybersecurity, and digital transformation initiatives within complex public-sector environments.

As Head of IT Department at the Greek Ministry of Education, I lead the strategic direction, architecture, and security of national IT infrastructure — including the critical systems underpinning Greece's national examination process.

In parallel, I serve as Cybersecurity Consultant at CVC Advisers S.A. (Luxembourg), advising on security architecture, strategy, threat detection, and infrastructure hardening.

My Ph.D. in Cloud Forensics (University of the Aegean, IKY Scholar) and MSc in Information & Communication Systems Security ground my work in rigorous academic research — with published contributions in IEEE and Wiley journals.

Cloud Forensics Zero Trust Azure Check Point Hyper-V GRC Incident Response NIS2 Active Directory
10+
years in IT & Cybersecurity
PhD
Cloud Forensics · University of the Aegean · IKY Scholar
8+
professional certifications (Microsoft, Check Point, Cisco, Fortinet)
5
peer-reviewed academic publications
// 02 · Expertise
Core domains.
🔍
Digital Forensics & Cloud Investigations
PhD-level expertise in digital evidence acquisition and analysis in cloud environments (IaaS, PaaS, SaaS). Research published in IEEE and Wiley, focusing on time synchronization and evidentiary integrity.
🛡️
Critical National Infrastructure
Architect and senior administrator of national IT systems including the Greek National Exams infrastructure — ensuring 24/7 availability and security for mission-critical public services.
☁️
Cloud Security Architecture
Microsoft Azure Solutions Architect Expert. Designs secure cloud architectures with Zero Trust models, identity & access management, and regulatory compliance (NIS2, GDPR).
📋
Cybersecurity Governance & Strategy
Develops enterprise cybersecurity strategy and risk management frameworks for public and private organisations. Aligns security posture with ISO 27001, NIST CSF, and EU directives.
🔒
Network Security & Perimeter Defense
CCSE-certified in Check Point NGFW solutions. Experienced in network segmentation, VPN architectures (including Ministry-wide remote access), and deep packet inspection in enterprise environments.
🖥️
Enterprise Infrastructure & Virtualisation
Extensive hands-on experience with Hyper-V, private cloud, HCI S2D clusters, Microsoft System Center, Microsoft Exchange and storage solutions at scale — in both design and daily operational roles.
// 03 · Experience
Work history.
Sep 2022
— Present
Head of IT Department
Greek Ministry of Education · Athens, Greece
  • Solution architect of the IT and cybersecurity infrastructure of the Greek Ministry of Education
  • Solution architect / security architect of the Greek National Exams IT infrastructure
  • Coordinator for the maintenance and security of national IT systems and exam infrastructure
  • Management of provider contracts and SLAs
May 2025
— May 2026
Cybersecurity Consultant
CVC Advisers S.A. · Luxembourg
  • Cybersecurity architecture and security strategy advisory
  • Network and systems security management
  • Infrastructure security hardening and vulnerability mitigation
  • Security monitoring, threat detection and incident analysis
Sep 2015
— Aug 2022
IT Solution Architect · IT Security Officer
Greek Ministry of Education · Athens, Greece
  • Architect and daily operator of Ministry IT infrastructure: Servers, Hyper-V, private cloud, clusters, Storage, HCI S2D, networks
  • Security architect for the National Exams IT infrastructure
  • Active Directory Enterprise Administrator
  • Solution architect for Ministry-wide VPN remote access
  • System Center 2016 & MS Exchange 2013 Administrator
  • Responsible for 24/7 infrastructure availability
  • IT Team Leader — project "GEAR" (Greece Exploring Advanced Recognition in Higher Education), 2016–2017
Oct 2005
— Aug 2015
Teacher
Greek Ministry of Education · Athens, Greece
  • Teaching networks, programming, and communication systems
May 2004
— May 2005
Software Engineer
Greek Army · Athens, Greece
  • Development of applications for the Greek Army in C++ and Java
Apr 2003
— Mar 2004
Software Engineer
Alexander TEI · Thessaloniki, Greece
  • CP-Net programmer for evaluation of Security Protocols
// 04 · Credentials
Certifications & Academic background.

Professional Certifications

CP
SE
Check Point Certified Security Expert R81
Check Point · CCSE · March 2025
MS
AZ
Azure Solutions Architect Expert
Microsoft · AZ-305 · April 2024
CS
CO
CyberOps Associate
Cisco · January 2023
MS
CE
MCSE: Core Infrastructure
Microsoft · January 2021
FT
NT
Network Security Expert (NSE) 4
Fortinet · January 2020
CN
SS
CNSS 4011 Information Assurance
Committee on National Security Systems · August 2019
CC
NA
CCNA Security
Cisco · August 2019
CC
NA
CCNA Routing & Switching
Cisco · May 2019

Academic Background

PhD
Doctor of Philosophy in Cloud Forensics
University of the Aegean, Samos
Awarded: 25 Aug 2023 · IKY Scholar · Supervisor: Prof. Lilian Mitrou
MSc
Information & Communication Systems Security
University of the Aegean, Samos
2009 – 2011 · IKY Scholar
BSc
Bachelor's Degree in Information Technology
Alexander Technological Educational Institute, Thessaloniki
1999 – 2003

Languages

GR
Greek
Mother tongue
EN
English
Certificate of Proficiency · University of Michigan
// 05 · Publications
Selected research.
Time Synchronization: Pivotal Element in Cloud Forensics
Security and Communication Networks · Wiley Publications
2014
Digital Forensics in the Cloud Computing Era
Globecom Workshops (GC Wkshps) · IEEE
2012
Computer – Internet Forensics: Technical and Legal Dimensions
M.Sc. Thesis · University of the Aegean
2011
An Agent-Based Approach to Modeling the Secure Transaction Protocol (SET)
ICTAMI International Conference on Theory and Applications of Mathematics and Informatics
2003
A Formal and Executable Model for Path Finding
1st South-East European Workshop on Formal Methods · SEEFM'03
2003
// 06 · Contact
Let's connect.

Available for collaboration on cybersecurity strategy, cloud security architecture, digital forensics investigations, mission-critical IT architecture and academic or research activities.

Based in Athens, Greece. Reach out via email or phone to discuss how I can support your organisation.

nikos_maragos@hotmail.com +30 697 643 6217 LinkedIn Profile Marousi, Athens, Greece