While dealing with commerce, he became the local representative of Ford Motor Company and Standard Oil (presently Mobil) in 1928. When Ankara became the capital of young Turkish Republic, construction activities increased and Vehbi Koç began trading in construction materials, building supplies and hardware. Following establishment of branch offices in Istanbul and Eskişehir in 1938, Koç gathered its enterprises under the company Koç Ticaret A.Ş.