ThreatScene and EFA Group announce the establishment of Thyreos Cyber, a joint venture focused on defence-oriented cybersecurity for mission-critical and high assurance environments. The new company is created to strengthen the protection and readiness of critical and defence infrastructures against modern and evolving threats.
Hybrid threats increasingly combine cyber operations with wider pressure on operational continuity, decision-making, and trust. In this environment, cybersecurity is not only a technical function. It is a core requirement for resilience, readiness, and mission assurance.
Why Thyreos Cyber was created
Thyreos Cyber is designed to help defence and mission-critical organisations move from planning to proven readiness. The focus is practical. Build capabilities that can be trained, tested, validated, and improved under controlled conditions, without risking live systems.
Cyber Range with Digital Twins. A core capability
A central pillar of Thyreos Cyber is its Cyber Range platform with Digital Twins integration, positioned as the first military-oriented infrastructure of its kind in Greece.
A cyber range is a secure, isolated digital environment where realistic attack and defence scenarios can be executed safely. It supports training, mission rehearsal, and capability validation without impact on operational networks.
Digital Twins replicate real systems and networks in a digital format, allowing organisations to:
- Recreate realistic operational conditions and constraints
- Train teams on scenarios that mirror real environments
- Test tools and procedures safely before deployment
- Measure readiness and drive improvements based on evidence
Services and operational support
Thyreos Cyber provides services across the readiness lifecycle, including:
- Services and Operational Support
- Adversary Simulation and Red Teaming: Assess readiness with realistic threat behavior.
- Penetration Testing: Evaluate security across mission-critical and enterprise environments.
- Combined Exercises: Enhance coordination, detection, and response performance.
- Incident Support: Rapid response to incidents to minimize operational downtime.
- Threat Hunting: Early detection of threats in corporate, industrial, and defense environments.
Statement from the CEO of Thyreos Cyber
“The establishment of THYREOS CYBER marks a strategic investment in operational readiness and resilience for the defence and critical sectors. By combining specialised cyber security expertise with deep understanding of defence systems, we are building an integrated framework for training, assessment, and operational strengthening that meets the demands of the modern digital battlespace. Our goal is to position Greece at the forefront of defence cyber technology, delivering internationally aligned solutions with a clear focus on deterrence.”
Georgios Menexis, CEO, Thyreos Cyber
Statement from the CEO of ThreatScene
“Thyreos Cyber is a focused defence-oriented initiative, designed for the new environment of hybrid threats. In this environment, cyber determines resilience and continuity of operations. Thyreos Cyber was created to strengthen the cyber readiness of critical and defence infrastructures, with realistic preparation and clear operational criteria.”
Katerina Tasiopoulou, CEO, ThreatScene
About ThreatScene
ThreatScene is a cybersecurity company delivering offensive and defensive operations, incident response support, and cyber readiness services for organisations operating in high-risk and mission-critical environments.
About EFA Group
EFA Group is an international group with a strong Greek presence across Aerospace, Defence, High-Technology and Security markets, with more than 30 years of experience in global markets.
Learn more
Thyreos Cyber: https://thyreoscyber.com/
