About Dr. Charalambos Theodorou
Founder & CEO of Xybern | PhD in Artificial Intelligence | Agentic Security
Dr. Charalambos Theodorou is a technology entrepreneur, artificial intelligence researcher and the Founder and CEO of Xybern, an agentic cybersecurity company building authorisation infrastructure for autonomous artificial intelligence.
With more than a decade of experience spanning artificial intelligence, software development, research and advanced technology, Dr. Theodorou has built his career at the intersection of AI research, engineering and entrepreneurship.
His expertise spans autonomous AI agents, agentic security, large language models, machine learning and deep learning, reinforcement learning, reasoning systems, computer vision, multimodal AI and AI safety.
Today, his primary focus is the security and authorisation infrastructure required as artificial intelligence evolves from systems that generate information into autonomous systems capable of taking real-world actions.
Founder & CEO of Xybern
As Founder and CEO of Xybern, Dr. Theodorou leads the company's strategic direction, technology vision and product development. He remains closely involved in Xybern's technical architecture, research and innovation while overseeing corporate strategy, partnerships, market development and long-term growth.
Xybern is focused on one of the fundamental security challenges created by increasingly autonomous artificial intelligence.
Building the Authorisation Layer for Autonomous AI
Xybern is developing an authorisation layer designed specifically for autonomous AI agents. The platform sits between agent intent and execution, allowing organisations to determine whether an autonomous action should be authorised, denied or escalated for human approval before it reaches the target system.
His work is particularly relevant to regulated and high-consequence environments where security, accountability and control are fundamental requirements for the adoption of autonomous AI.
Background in Artificial Intelligence
Dr. Theodorou's interest in technology began at an early age through programming and experimentation with computers. He went on to build an academic foundation spanning computer science, mathematics, data science, machine learning and artificial intelligence.
He holds a PhD in Artificial Intelligence, an MSc in Data Science and Machine Learning, and a BSc in Computer Science and Mathematics.
Throughout his professional and academic career, he has worked across machine learning, autonomous systems, large language models, reasoning systems, reinforcement learning, computer vision and multimodal artificial intelligence. His background combines research-level understanding of artificial intelligence with practical experience developing and deploying AI systems.
Research & Innovation
Research has been a central part of Dr. Theodorou's career, spanning Artificial Intelligence, Machine Learning & Deep Learning, Autonomous Systems & AI Agents, Computer Vision, Large Language Models, Reinforcement Learning, Reasoning Systems, Multimodal AI, AI Security & Safety and Agentic Security.
View research & publicationsHe has contributed to peer-reviewed academic research and the development of patented intellectual property in artificial intelligence. His current research interests increasingly focus on the intersection between autonomous artificial intelligence and cybersecurity, particularly identity, authority, delegation, policy enforcement and accountability for autonomous agents.
From AI Research to Agentic Security
Dr. Theodorou's experience across research, engineering and entrepreneurship has shaped how he approaches the emerging autonomous AI landscape.
As AI systems become more capable, the challenge is no longer simply making models more intelligent. Organisations must also determine how intelligent systems can operate safely when they are given access to real-world resources and the ability to make decisions independently.
Technology, Research & Entrepreneurship
Dr. Theodorou brings together three perspectives in his work: scientific research, practical engineering and entrepreneurship.
His experience allows him to examine emerging artificial intelligence technologies not only in terms of what is technically possible, but also what can be deployed responsibly, what creates meaningful commercial value and which security controls become necessary as intelligent systems gain greater autonomy.
His work has applications across technology-intensive and regulated environments including cybersecurity, financial services, healthcare, government and critical infrastructure, where security, accountability and control are particularly important to the adoption of autonomous artificial intelligence.
Academic Contribution
Beyond his commercial and research work, Dr. Theodorou contributes to the academic community through voluntary peer review for scientific publications and journals.
He supports continued investment in education, scientific research and responsible technological development.
His broader perspective is that increasingly capable technologies should ultimately contribute positively to human progress while being developed with appropriate responsibility, security and accountability.
Leadership
Dr. Theodorou's approach to leadership is grounded in responsibility, discipline, resilience and long-term thinking.
His work focuses on building technologies and organisations around problems that are likely to become increasingly important as artificial intelligence becomes more capable and autonomous.
"The future is not something we wait for. It is something we build responsibly."
Dr. Charalambos Theodorou