convex ZT GmbH is an owner-operated, interdisciplinary design office in the field of construction. Our team consists of civil engineers, architects, mechanical and electrical engineers at our locations in Graz/Austria, Istanbul/Turkey, Cluj-Napoca/Romania and Plovdiv/Bulgaria.

For 40 years we have been developing economical and sustainable solutions for construction projects in the areas of industrial construction, paper mills, thermal power plants, hydropower plants, hospitals, culture and education, living and office, bridge construction, noise protection and revitalization.

We take care of your construction project from its beginning to its end: we create feasibility studies, basic designs, cost estimates, permit and tender designs as well as detail and workshop designs, we manage the project and supervise the construction site.

We have many years of international experience with completed projects in more than 45 countries. Our multinational team of more than 40 people speaks many languages and is familiar with a wide range of national and international standards and customs in the construction industry.