Rıdvan Yirmibeşoğlu was born in 1960, in Istanbul. After graduating from the Political Science and Public Administration department of Istanbul University, Yirmibeşoğlu completed his masters degree on Organisation, Management, and Operation Policies in the Business Administration Faculty of Istanbul University in 1986. In 1986, Mr.Yirmibeşoğlu joined Kordsa and became the Human Resources Manager of the company in 1990. In 1996, he was appointed the Assistant Head - Human Resources of Sabancı Holding. Mr.Yirmibeşoğlu is also the Chairman of Turkish Personnel Association (PERYON) since December 2002.