Michael Tsamaz
Independent Non-Executive Member
Mr. Michael Tsamaz was elected as Independent Non-Executive Member of the Board of Directors of the National Bank of Greece in November 2025.
Mr. Tsamaz is a distinguished leader, notable for his achievements in corporate transformation, digital innovation, and people-centered management. As Chairman and CEO of OTE Group (2010-2024), Greece’s largest technology and telecommunications company, he led one of the most successful corporate restructurings in Europe, turning a company facing challenges into a profitable, agile, and future-ready technology enterprise.
Through his leadership, he secured OTE’s sustainability and placed it firmly back on a growth trajectory, while this achievement was recognized by the Harvard Business School in two landmark case studies taught internationally.
In parallel, he established OTE as a leader in ICT services and expanded into new business areas such as with Payzy (fintech), Cosmote Insurance (insurance digital aggregator) etc., broadening the Group’s digital ecosystem. Most importantly, OTE became the backbone of digital society, with its networks and digital platforms enabling the Greek State to modernize and provide public services online.
Mr. Tsamaz integrated strong ESG principles into corporate strategy, advancing environmental sustainability, social responsibility, and inclusion. He consistently combined business excellence with social responsibility, supporting numerous social organizations, including children’s welfare organizations and cultural foundations with various initiatives as well as with other initiatives for nature preservation and environmental sustainability.
Before his tenure as CEO, Mr. Tsamaz held senior positions across the OTE Group (Cosmote, OTEGLOBE, OTE Investments, OTE International), and earlier built his career in Vodafone, Philip Morris International, and Warner Lambert in marketing and sales key leadership roles.
Today, he also serves as Chairman of Uni.Systems and Chairman of Intracom Defense, while also leading CORESIGHT, his strategic advisory firm.
Mr. Tsamaz holds a Bachelor’s degree in Business Administration from the University of New Brunswick, Canada. His contributions have been widely recognized with various awards such as an honorary Doctorate Degree in Business Administration from University of Piraeus, an honorary promotion to Brigadier General of the Hellenic Defense Forces, as well as with international accolades being included in various international lists of people with influence in Telecoms and Technology (Global Telecom Power 100).