Management Team

Vassilis Antonopoulos


Vassilis Antonopoulos, a graduate of the Athens University of Economics with postgraduate studies at Manchester Business School. Joined ESA in 2011 as Deputy Managing Director and became company’s CEO in 2012. He has extensive managerial experience of more than 20 years in the security industry. He served 10 years as General Manager in Wackenhut Hellas and Managing Director of G4S Greece from 2006 to 2011.

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

As of 2012, Nasos has been CFO of Amarla Retail Group, largest European licensee of Victoria’s Secret (LBrands), with presence in 11 countries. From 2008 till 2016, he was member of Corporate Finance department of Athens International Airport (AIA), working on projects in cooperation 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. As of early 2019, he is part of ESA.

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 Michaili, is a graduate in Mass Media and Communication of Athens University and from the National School of Public Administration. She also holds a Μsc in Human Resource Management of the Athens University of Economics and a Postgraduate Diploma in «Security and Risk Management» from University of Leicester. She is also a certified GCDF (Global Career Development Facilitator) Career Consultant and a Master NLP Practitioner. She joined ESA team in 2013 and since 2015 holds the position of Human Resources Manager and member of the Management Team. During her professional career she has worked as an executive in public organizations and in Security Services Companies as Head of Human Resources.

Konstantinos Pazoulis

Commercial Director

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

Panagiotis Gavathas

Operations Director_Aviation and Critical Infrastructure

Panagiotis Gavathas, a post-graduate of Montpellier III and Aix-en-Provence Universities in Defense and Security (MA DefSec), as well as in Business Administration (MBA). He has 15 years of experience in advanced security solutions development and management for critical infrastructures (CI). He was working for the Ministry of Defense, the Permanent Delegation of Greece at the EU. Since 2017, he holds the position of Operations Manager Critical Infrastructure and is a member of the Management Team.

George Papazoglou

Operations Director_Commercial Security

George Papazoglou holds the position of Operations Manager from December 2018. He has many years of experience in planning, organization and implementation of security services and projects through his cooperation with multinational companies as well as private and public sector organizations. George is a retired Special Forces officer worked primarily in security, operational planning, intelligence and training. He has Business Administration studies and he has participated in international projects with private and public security agencies.

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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