Career
A graduate of Ankara University in Political Science. Sezgin started his football career with Petrol Ofisi South.K. in the TFF First League. He later played for Ankaragücü and Adana Demirspor in Turkish Super League, before ending his career with San Jose Earthquakes in United States of America. After retiring from football, he founded Professional Football players Association in Turkey and is the honorary president
He served in Turkish Football Federation as Secretary-General between 1990–1992.
He was the president of İstanbulspor until 2004. He is fluent in English.
Sezgin served Galatasaray South.K. between 1992 – 93 and 1996-1997 within Football Committee. Then in 2005, after Özhan Canaydın elected as Galatasaray president for one more term, Sezgin became the general manager of Galatasaray Sportif, the specialized marketing management company, to oversee marketing operations of the Galatasaray brand.