OUR TEAM

Yiannis Koukouras

Managing Director

Yiannis has over 15 years of experience in the Cyber Security domain, specialising in the consulting services area. He started his career as a network security administrator and member of the CERT team at the Corps of Computing and Research of the Greek Army. He then went on to offer IS consulting services to various companies across the globe, gaining valuable, hands-on experience. Yiannis has partnered with some of the leading Information Security companies in the EMEA region and has accrued knowledge in working across different regions and industries, both on the field of security management and information security assurance.

Responding to the opportunities presented by the growth of the ICT sector worldwide , Yiannis founded TwelveSec in order to bring together a team of seasoned pen-testers and security consultants that share the same passion for innovation and attention to detail. These days Yiannis is working tirelessly so TwelveSec can be recognised as one of the top Information Security firms on a global level.

His academic qualifications include a BEng in Electronic Engineering from the University of Lancaster and an MSc in Computer Systems Security from Glamorgan University, Wales. He also holds some of the most widely acclaimed certifications in the industry, such as CISSP, CISA, CISM, ISSAP and OSCP. Yiannis is an affiliate and member of ISACA, (ISC)2, and he is a board member of the Hellenic (ISC)2 Chapter where he holds the position of communications manager. Yiannis has also volunteered as the coach of the Greek Cyber Security National Team.

 

Yiannis Koukouras

Managing Director

Our valiant leader, el jefe, the infallible being, the creator, and the majority shareholder.

In 2012 he founded TwelveSec and brought together a team of experts whose main means of entertainment is to point out his mistakes.

During his youth he somehow convinced two respectable academic institutions to award him both a bachelors and a masters degree. But his days of deception do not end there; numerous organisations arguably went bonkers and gave him industry specific certifications like CISSP, CISA, CISM, and OSCP to name but a few of his victims.

Finally, we have to warn ISACA, (ISC)2, and OWASP that they have a master deceiver in their midst.

 

George Karagianidis

Chief Operations Officer

George is a Senior Information Security Consultant at TwelveSec. George is a seasoned pen-tester, having accumulated a wealth of experience from performing, as well as leading, Information Security projects that range from System/Network/Web Application Penetration Tests to Reverse Engineering, Security Design and Architecture of critical Information Systems, and Information Security Management System (ISMS) implementation.

George has been involved in Information Security projects across different industries, including major Greek and Middle-Eastern banks, Telecoms providers, the European Commission and the US Health sector. He is interested in all the latest developments in the security industry, keeping pace with the latest cutting-edge technologies and techniques that allow him to find innovative solutions to the complex puzzles posed by the ever-evolving ICT sector.

 

George Karagianidis

Chief Operations Officer

The XO, the almost infallible being, the heir to the throne, and a minority shareholder.

One of the originals, the eldest member of the Operations Department, he is well loved by his minions as they will definitely tell you themselves if you meet them when they are allowed out from the dunge… I mean during their coffee break.

Finally, I won’t do him justice if I do not mention his award winning micro management techniques. And who in his right mind doesn’t love constant micro management.

 

George Karpouzas

Head of R&D, Senior Penetration Tester

George’s professional experience as a Penetration Tester, Red Teamer and last but not least a Security Researcher spans for more than 8 years.
With more than 20 years of experience in Software Programming, George was writing code even before he enrolled at the Computer Science Department of Athens University of Economics and Business
His professional interests include Offensive Tools Development, Red Teaming, Kernel development, and IT Security; while always looking for new interesting developments in the field of Cyber Security.

 

George Karpouzas

Head of R&D, Senior Penetration Tester

With Dr Strangelove being his childhood idol, I would like to take this opportunity to apologise to the world for our less than brilliant decision to give George the keys to the lab. We honestly didn’t know.

He has been locked in there for weeks now. The good thing is that society hasn’t collapsed all around us, yet…

 

Phil Kaloheretis

Finance & Administration Officer

Phil is responsible for ensuring that everything runs smoothly within TwelveSec.

Being the head of two departments he is putting his considerable experience to the test every day.

When he is not involved in projects within his departments, he tries to find ways to help the company grow.

He holds a BSc in Sociology and an MBA.

 

Phil Kaloheretis

Finance & Administration Officer

The top bean counter of TwelveSec.

When the upper management wants to blame someone, he is there to take the fall.

It is always safe to bet into people’s love for accountants.

To Phil’s defence he started his life with dreams of being a respectable sociologist, it is sad that he decided later on to join the Dark side and get an MBA.

 

Panagiotis Yialouris

Red Teaming & Penetration Testing Lead

Panagiotis is a security consultant with more than six years of both academic and professional experience in the Information Security field.

He holds a BSc in Informatics from the University of Piraeus and an MSc in Computer Security from the University of Birmingham.

His prior working experience includes the Cyber Defence department of the Greek Army, as well as various IT roles in the Research and Healthcare sectors.

Panagiotis has honed his technical expertise in the field of Cyber Security by participating in numerous InfoSec projects worldwide. From Technical Security Assessments and Source Code Reviews to Penetration Testing and Red Teaming Projects, he is always looking to increase his experience with a hands-on attitude.

 

Panagiotis Yialouris

Red Teaming & Penetration Testing Lead

Panagiotis, TwelveSec’s field commander, somebody called him that once and since then he is managing his teams like being in the military proper.

And how his subordinates love him, especially his affection for using people as cannon fodder whenever possible and the constant delegation of blame; only the blame mind you.

Everybody adores shouldering the blame since whatever went wrong it was obviously their fault.

I would have loved to provide you with testimonials from Panagiotis’ team about his brilliance and their unyielding love but when I asked them surprisingly everybody had previous engagements … strange.