Management Team

Vassilis Antonopoulos

Executive Chairman

Vassilis Antonopoulos, a graduate of the Athens University of Economics with postgraduate studies at Manchester Business School in Business Administration. He has extensive managerial experience of more than 25 years in the security industry. He served 10 years as General Manager in Wackenhut Greece and as Managing Director of G4S Greece from 2006 to 2011. Joined ESA in 2011 as CEO and in 2014 he implemented the successful Management buyout of the company from ISS Global. Since 2019 he is the Executive Chairman of the Board.

George Mathios

CEO and Vice Chairman

George Mathios is the CEO and Vice Chairman of ESA since mid-2019. He has extensive experience in corporate management. He has served as CEO at DIGEA A.E. and member of the Board of Directors of the Hellenic Corporation of Assets and Participations (HCAP). He has held various senior positions in HSBC Bank Plc., Coca-Cola Company, Multichoice Hellas and Procter & Gamble. He is a PhD of the Athens University of Economics and Business and holds an MBA from Manchester Business School. George Mathios holds a MBA from the Manchester Business School. He is also a Mechanical / Engineer and holds an MSc degree from the University of Manchester, and an M.Sc degree in Shipping and Marine Engineering from the University of Newcastle UT.

Nasos Kalamatianos

Chief Financial Officer

Nasos Kalamatianos is the CFO of ESA as of early 2019. Previously, he was Group CFO at Amarla Retail, largest European licensee of Victoria’s Secret and member of Corporate Finance team of Athens International Airport (AIA). Nasos has cooperated on large projects with companies such as McKinsey, Credit Suisse, AT Kearney, Deloitte, PWC and others. He holds a BSc in Financial and Banking Management from University of Piraeus, as well as an MSc Management from Imperial College London

Christos Kontos
Chief Solutions Officer
Christos Kontos, an electrical engineer from Athens Technological Institute and MBA from Nottingham Trent University. He joined ESA in 2011 as Sales Manager for Security Solutions and also a member of the Management Team. Since 2016 he holds the position of Security Solutions Manager. He has 20 years of management experience in the fields of automation and security in large multinational organizations (Motorola, Honeywell, Siemens, G4S).
Maria Michaili

Human Resources Director

Maria, is a graduate in Mass Media and Communication from the Athens University and in Public Administration from the National School of PA. She holds a Μsc in Human Resources Management from the Athens University of Economics and a Postgraduate Diploma in Security & Risk Management from the University of Leicester. She is a certified Global Career Development Facilitator & a Master NLP Practitioner. Maria joined ESA in 2013 and became an HR Director and Management Team member in 2015. She has worked as HR executive in public sector and in security companies.


Konstantinos Pazoulis

Commercial Director

Konstantinos, joined ESA in 2013 and since 2017 is a member of the Management Team as Operations Manager - Manned Security. Konstantinos is a graduate of Greek-British College and studied IT at Patra's Open University. During his professional career, he worked as Sales Manager and Head of Tendering dept. in Greek and Multinational companies. Since 2019 he is the Commercial Director of ESA

Panagiotis Gavathas

Operations Director Aviation & Critical Infrastructure

Panagiotis, has 20 years of experience in Homeland Security, Aviation & Ports Infrastructures. He holds a MA in Defense & Security from Montpellier III and Aix-en-Provence Universities, as well as an MBA Executive from Piraeus University. He also holds the Aviation Security Awareness Diploma by IATA and the National Defense Armament Planning by CHEAr-DGA FR. Panagiotis joined ESA in 2017 as Critical Infrastructures & Aviation Operations Director. Prior ESA he was the Commercial Manager of ICTS Greece.

George Papazoglou

Operations Director Commercial Security

George is a retired Special Forces officer and has Business Administration studies. He worked primarily in security, operational planning, intelligence & training and participated in international projects with private and public security agencies.  Since 2019 he holds the position of Operations Director in Commercial Security. Prior ESA George was the Project Manager for Athens US Embassy security contract on behalf of Brinks. He has extensive  experience in planning, organizing and implementing security projects of high magnitude or complexity.

Maria Tsafa

Finance Director

Maria Tsafa has been the Financial Director at ESA since the end of 2019. She holds a degree in Economics from the School of Law, Economics and Political Science of the Aristotle University of Thessaloniki, with a focus on Business Economics. She has served as Accounting and Personnel Manager at Latsis Group companies, while she has worked as an Economist at Deloitte and other private companies.

Manolis Drosoforidis

Network and ISO Director

Manolis Drosoforidis, an electronic engineer and a professor at Electronic Engineering department of Piraeus Technological Institute. Joined ESA security solutions in 2011 and became member of the Management Team in 2012 as Director of Electronic Security Solutions. He has more than 25 years of experience as Technical Director at large Greek and multinational organizations (Intertec – Panasonic, G4S).

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