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Our team at PROTASIS is composed of dedicated professionals who bring a wealth of knowledge and expertise to every project. With a strong foundation in our core values, we work collaboratively to provide innovative solutions that meet the needs of our clients. Each member of our team plays a crucial role in driving our success, ensuring that we consistently deliver high-quality results while maintaining a focus on integrity and excellence.
What sets our team apart is the diversity of experiences and skills that each individual brings to the table. This blend of seasoned leaders allows us to approach challenges from multiple angles, fostering creativity and continuous improvement. United by a shared vision, we strive to exceed expectations, push boundaries, and lead the way in our industry.
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Vassilis Georgiou
Founder, CEO & Managing Director
Vassilis Georgiou
Founder, CEO & Managing Director
Vasilis Georgiou was born in Athens in 1966. He holds a BEng in Electrical Engineering, an MBA, and an MSc in Management of Energy Systems.
In his professional career he developed his expertise in strategic management positions such as business development, project management, strategic design, organizational development, and transformation. His career includes roles at diverse SMEs and international companies within the fields of electrical energy and telecommunications. Since 2002, he has served as the President and Managing Director of PROTASIS SA, being the driving force behind the company's vision and strategy, guiding its growth and success.
As a founder and shareholder of the company, he is highly engaged in the company’s continued success, ensuring that it remains at the forefront of its field.
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Ilias Milis
Founder and Shareholder
Ilias Milis
Founder and Shareholder
Ilias Milis obtained his Diploma in Electrical and Mechanical Engineering from the National Technical University of Athens (NTUA) in 1969. He joined the Public Power Corporation (PPC) of Greece in 1975, eventually becoming the Head of the Operation Studies Section (Load Flow & Protection Coordination). In 1999, he transitioned to the Independent Power Transmission Operator (IPTO), where he served as Head of the System Operations Department - System Security Section.
He is one of the founders and key shareholders of PROTASIS, bringing a wealth of technical expertise to the organization. As a senior corporate advisor, he actively participates in the company’s daily operations, offering strategic guidance and technical insights. With a strong background in power system analysis, protection systems and planning, with emphasis on production, transmission and distribution systems both in Greece and abroad, he has been instrumental in developing the company’s core technologies and driving innovation.
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Dimitris Tsakiris
Founder
Dimitris Tsakiris
Founder
Dimitris Tsakiris received his Diploma in Electrical and Mechanical Engineering from the National Technical University of Athens, Greece, in 1969.
He began his professional journey in 1972 with the Public Power Corporation of Greece, where he served as a Power System Protection and Control Engineer until 2002.
He is one of the founding members of PROTASIS, bringing extensive experience in designing and commissioning protection schemes for industrial facilities. His guidance and expertise have positioned PROTASIS as a leader in its field, ensuring that the company’s products and services meet the highest standards of quality and performance. His technical knowledge continues to be a key asset in the company’s ongoing growth and success.
“Delivering exceptional solutions has been our commitment from day one. Our success is owed to the outstanding talent within our team, whom I am privileged to call partners.”
Vassilis Georgiou
CEO
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George Arvanitis
Chief Commercial Officer
George Arvanitis
Chief Commercial Officer
George Arvanitis joined PROTASIS in 2008 and since 2025 he is the Chief Commercial Officer, driving the company’s commercial strategy and operations. Previously he served as the Head of the Systems Integration Division, focusing on the integration of Intelligent Electronic Devices, OT cybersecurity, development of Human Machine Interfaces (HMI), SCADA Systems, and Power Management Systems (PMS).
He holds a bachelor’s degree in Electrical and Computers Engineering with specialization in Energy Systems and a Master in Engineering for Energy Production and Management, both from the National Technical University of Athens (NTUA). George Arvanitis is a member of the Technical Chamber of Greece since 2005.
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Petros Katsikas
Chief Technical Officer
Petros Katsikas
Chief Technical Officer
Dr. Petros Katsikas joined PROTASIS in 2005, and he has been the Technical Director since 2022 and the Chief Technical Officer since 2025. He received his MSc and PhD in Electrical Power Systems Engineering from the National Technical University of Athens (NTUA) in 1998 and 2003, respectively. He has also participated as a co-author in a large number of scientific publications and served as a keynote speaker in conferences and symposia.
His professional and educational skills, along with multiannual working experience, focus on power system protection and control engineering, automation systems design, static and dynamic security assessment studies, and consulting. He has been a member of the Technical Chamber of Greece since 1999.
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Aggelos Goritsas
Engineering & Systems Director
Aggelos Goritsas
Engineering & Systems Director
Aggelos Goritsas joined PROTASIS in 2009 and currently serves as the Engineering & Systems Director, leading the teams of Engineering & Field Applications, SCADA Systems & Telecoms, and Research & Development.
He holds a diploma in Electrical and Computer Engineering from the National Technical University of Athens (NTUA). Throughout his career at PROTASIS, he has significantly contributed to the analysis, development, and implementation of projects related to Substation Automation Systems, Protection & Control Systems, and the testing of both Primary and Secondary Equipment. Currently, he is actively involved in developing algorithms for photovoltaic parks and energy storage systems. Since 2009, Aggelos has been a member of the Technical Chamber of Greece.
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Irini Vavanou
Finance & Accounting Director
Irini Vavanou
Finance & Accounting Director
Irini Vavanou joined the PROTASIS Accounting department in 2016, and currently serves as Finance & Accounting Director, bringing over 15 years of financial expertise to the role. She leads the Finance & Accounting Division and is responsible for overseeing the organization’s financial operations, ensuring transparency and sound financial management.
With a commitment to continuous improvement, Irini works closely with PROTASIS’ leadership team to align financial planning with the corporate mission and objectives. She holds a Bachelor's degree in Business Administration from Hellenic Open University.
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Dimitris Chourmousis
Head of Procurement & Contracting Division
Dimitris Chourmousis
Head of Procurement & Contracting Division
Dimitris Chourmousis joined PROTASIS in 2024 as Head of Sales for the Domestic Business Division. In 2025, he transitioned into the role of Head of Procurement & Contracting Division, bringing a strategic approach to procurement, sourcing and contract management. He holds a degree in Electrical and Computer Engineering from the National Technical University of Athens (NTUA).
Prior to PROTASIS, Dimitris gained extensive experience in major Greek EPC companies, overseeing electromechanical projects in Greece and abroad, and advancing to roles in project management, tendering, and sales for power transmission, distribution, and infrastructure sectors. He is committed to strengthening procurement and contracting practices through strategic sourcing, process improvement, and effective collaboration with partners, ensuring operational efficiency, and safeguarding the company’s commercial interests.
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Dionysis Papapaschalis
Head of Presales Division
Dionysis Papapaschalis
Head of Presales Division
Dionysis Papapaschalis joined PROTASIS in 2020 as an Account Manager, and currently serves as the Head of the Presales Division. He holds a Bachelor's degree in Engineering from the Technological Educational Institute of Athens and brings over 15 years of experience in the energy sector.
During his time at PROTASIS, Dionysis has developed extensive expertise in managing client relationships and driving business growth. His strong managerial skills enable him to effectively lead teams and tailor solutions to meet diverse client needs. He is committed to fostering collaboration and delivering exceptional service, ensuring that PROTASIS remains a trusted partner in the energy sector.
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Chrysa Zouli
Head of Marketing & Communication Division
Chrysa Zouli
Head of Marketing & Communication Division
Chrysa Zouli leads the Marketing & Communication Division at PROTASIS, bringing extensive experience in business development, technical sales and marketing, renewable energy, and strategic management. She holds a degree in Physics from the National and Kapodistrian University of Athens (UOA) and a Postgraduate Specialization Diploma in Energy Generation & Management from the National Technical University of Athens (NTUA).
Before joining PROTASIS in 2021, she held positions of responsibility in the energy sector, focusing on the development and execution of strategic business plans, market expansion, and building strong relationships with key partners and stakeholders. In her current role, she focuses on the strategic development of marketing and corporate communications, strengthening PROTASIS’ brand identity and presence across its markets, with an emphasis on collaboration, continuous improvement, and sustainable growth.