Hasan Dönmez, who was born in the Çal Bekilli district of Denizli in 1936, is the third child of a family of five children. Hasan Dönmez, who finished primary school in the district where he was born, started his business life at this young age. He started his business life by selling the molasses produced in a small molasses factory owned by his family to the surrounding provinces, and worked in many business groups such as bus management and transportation. Shortly after starting the bus business, his family moved to the center of Denizli and started to run intercity buses from Denizli to Izmir, Istanbul and Ankara. Hasan Dönmez, who has been in the bus business for a long time, realizes the need in the spare part sector and starts to look for ways to manufacture and market spare parts while maintaining his vehicles. It is difficult to manufacture spare parts, but they take the first step on this difficult path by selling spare parts they brought from Germany in the small shop they rented on İzmir Gazi Boulevard with his older brother Şükrü Dönmez. After 10 years, Hasan Dönmez is determined to produce the most defective products among these goods he sells. He established the first workshop in Kısık for this purpose. The year is 1986, we listen to those days from his own mouth as follows;We had a place in Kısık. We thought we could produce here and sell it in the shop on Gazi Boulevard. We went to the Hannover fair in Germany and bought several machines for production. By no means do we think of industrialism on a large scale. At first, we see it as a simple task; We will produce and sell parts. It's like it never was. We had a hard time over time, but we did not give up. This is necessary in order to succeed. If you are going to do something, you will go over all your difficulties. You will not say whether it will or not. 90% of trading is courage. You will have marital courage, you will decide by taking some risks first. Then, if you focus on your job and work hard, success will come to you when you bring that job to an end. ''Hasan Dönmez, the founder and current chairman of the board of Dönmez Clutch, which has developed the production of clutch systems over time and has become a world brand, still works today and follows all the processes.