Nick Arvanitidis

b_nickarvanitidisRetired from the corporate world since 1995, Nick Arvanitidis is an active investor in startups, financial markets and real estate. Among his latest seed-investment activities, he is the Founding investor and non-Executive Chairman of Delpor Inc. and Glocu Inc. Delpor develops the next generation Drug Delivery Systems which improve the clinical and commercial value of new and existing drugs and biopharmaceuticals. Glocu is a […]

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Katerina Pagkalou

Katerina_3.1Katerina Pagkalou is Metavallon’s Program and Operations Manager. Katerina holds a Bachelor’s degree in International Relations, European Studies, and Economics. Her career kicked off with an internship at the Hellenic Centre for European Studies followed by a much-coveted internship at the Greek Parliament’s Directorate of European Affairs. She later went on to explore the world of research as an Associate at the Center […]

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Phyllis Nikolaou

phyllis_metavallon sitePhyllis is Metavallon’s Marketing & Communications Manager. She has been creating content for print and digital media for almost a decade and the past few years she has been navigating the turbulent waters of digital marketing. Her latest journeys in uncharted digital waters have brought her to the shores of two online gaming companies, where she developed a strong passion for reporting, […]

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Marientina Chardalia


Marientina is Content & Digital Marketing Associate at Metavallon. Curious and enthusiastic, Maria-Constantina (aka Marientina) studied International and European Relations at the University of Piraeus, along with a semester abroad at Université Paris X Nanterre. Prior to Metavallon, she worked at a multinational company as a trainee, where she dived into the multi-faceted world of marketing. Maria-Constantina has recognized content and digital marketing as fundamental tools for the development of organizations and […]

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Myrto Papathanou

Myrto-Papathanou_expert220-e1421870283829-e727ca9113Myrto Papathanou has 15 years of work experience in the fields of finance and entrepreneurship, and has also been involved in several non-profit projects around the world. She started her career in banking in London, working as a credit risk and portfolio analyst for Dresdner Kleinwort Wasserstein and later as a Fixed Income Strategist of European and Asian portfolios for Bank of America. Returning […]

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Alexandra Choli

Alexandra is Metavallon’s Founder and Executive Director. She is a creative venturer, committed advisor, and active investor, passionate about growing very early-stage companies in the technology and social business sectors. At Metavallon, she focuses on program design, business development, and startup selection and progress. She is also responsible for research projects and fundraising activities. Prior to Metavallon, she worked in operations, management, and business development at several early-stage & small- to […]

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Nafsika Korovila

Nafsika Korovila
Nafsika is Metavallon’s former Operations Associate and engaged alumni. Having raised over 65.000 euro in scholarships, she is now attending an MSc program on Risk Management and Financial Engineering at Imperial College. Nafsika has a solid financial institutions’ exposure as she has interned for the Central Bank of Greece and Eurobank EFG. During her work at the Research Department of Eurobank EFG, she had the opportunity to research on […]

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