The reports published recently on the global defense industry emphasize that the 10-year contraction in defense spending of states has begun to be left behind. It is also possible to observe that Turkey's defense industry is developing and our defence companies are placed among the largest companies in the world. As the world defense market expands, it became possible for Turkish firms to become global players and main exporters. On the other hand, in recent analyzes, it is emphasized that the way of doing business in global markets has changed in the defense sector and that defense companies should adapt to new trends. This analysis examines the changing conditions in the defense sector and discusses the approaches that companies should develop in the new period.