In May 2019, MAI acquired its longtime partner amd.sigma strategic airport development GmbH (amd.sigma). The firm based in Berlin employs architects, real estate experts, business planner, city planner and aviation managers all specialized in airports. With over 24 years of experience in all aspects of airport planning and design, amd.sigma has earned an outstanding reputation in the market. This is further enhanced by great expertise in the area of cost estimates, airport business planning and commercial airport planning for the development of airports and airport cities.