Hasan Sonsuz Çeliktaş originates from Mersin as his hometown. After attending Toros High School, he graduated from Ankara University with a degree in Public Relations. After working five years as a research assistant at the same University, he resigned and founded derKİ. Thereafter, he began writing for derKİ as well. He was a writer of Cosmopolitan, Esquire, Yeni Aktüel, and the Akşam Newspaper. The author of three books, he has two children.