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Thodoris Margiolas

Thodoris Margiolas

Harvard Business School MBA 25' / Diploma in Civil Engineering, NTUA GMAT 720

The moment I started considering post-graduate studies as a possible next step, tackling the GMAT became my immediate priority. This was a challenge I could not have met so successfully without the expert guidance of Dia Gerontoudi and Mr. Karalis at Dia Gerontoudi Prep Center.

Dia is more than just a tutor; she is an inspiration and a mentor. Her unique approach helped me build intuition and gain a deeper understanding of the complex questions on the exam. She didn’t just focus on rote learning; she laid emphasis on logic and employed a robust process that helped me cut through the noise, enabling me to answer questions confidently and correctly. Beyond her technical expertise, Dia is a genuinely caring and inspiring individual who motivates her students to reach higher goals.

Mr. Karalis was equally instrumental in my preparation. His methodical approach and genuine love for mathematics transformed the quantitative section into an enjoyable and smooth experience. His knack for simplifying complex problems, coupled with practical time-saving tricks, proved invaluable in a high-pressure examination setting.

Five years after my rewarding experience at Dia Gerontoudi Prep Center, I have embarked on my journey at Harvard Business School. As I look back, I am profoundly grateful for the pivotal role that both Dia and Mr. Karalis played. They did more than prepare me for the GMAT; they laid a strong foundation for an ongoing pursuit of excellence.