Born on October 7, 1925, in Mersin, Turkey, Feeyaz was the son of Muhtar Berker, an ophthalmologist based in Mersin, who was elected to the Grand National Assembly of Turkey in 1939 as İçel deputy and remained in office until 1946. After completing his primary education in Mersin, Feyyaz enrolled in the American College in Tarsus, but after his family moved to Ankara, he went to Robert College where received his diploma in civil engineering, subsequently he went to the United States to earn a master's degree from the University of Michigan. Then he returned to Turkey to finish his military service, and by 1950 he started working at the Ministry of Public Works.
Born on October 7, 1925, in Mersin, Turkey, Feeyaz was the son of Muhtar Berker, a medical professional based in Mersin, who held public office as İçel deputy from 1939 to 1946. After completing his primary education in Mersin, Feyyaz pursued higher education at Robert College, but after relocating to Ankara with his family, he continued his studies in the United States at the University of Michigan. He then returned to Turkey to complete his military service and began working at the Ministry of Public Works by 1950.