Önder was born in Isparta in 1952 and graduated from Ege University, Faculty of Economics and Administrative Sciences with a degree in Marketing. Being a carpet weaver’s son, Önder worked at Renk Carpet Weavers and Klasik Carpet Weavers before being appointed as the Chairman of the Board of Directors at Klasik Carpets Co.
In the following years, Önder bought out Renk Carpet Co. and took over the position of Chairman of the Board of Directors. He is also CEO of Turelsan Pet Products and Food Co. He is a partner of Enda Holding Co. and Egenda Co.