OSSA was established on July 1, 2007 under the leadership of OSTIM Organized Industrial Region. OSSA has more than 270 member companies from Ankara, Balıkesir, Bursa, İstanbul, İzmir, Kayseri, Kocaeli, Konya, Manisa, Mersin, and nearly 10000 employees and over 50 areas of activity. For land, air and naval platforms; R&D/design, software, composite manufacturing, electronics, electromechanics, harness, machining, sheet metal forming, surface development, test/calibration, coating/painting, optical systems, hydraulic systems, machinery/equipment manufacturing, unmanned systems and many final products and the production of subsystems are among the capabilities and competencies of our members.

OSSA, within the framework of cooperation, collaboration, and competition to increase the competitive level of member companies, creates a significant synergies for encouraging in the fields of R&D, innovation, finding new markets, encouraging for international cooperation, providing competitive advantage, adapting to developing technology (digitalization), creating value, improving of corporateness and quality systems, specialization, creating a roadmap and domestic and national production.  OSSA continues its activities such as creating strategies specific to SMEs, organizing events to gain competitive advantages in Turkey and abroad, organizing delegation visits, domestic and international promotion, representation and marketing activities, press and public relations, technology transfer and joint projects within the scope of university-industry cooperation.