VDA offers consulting services encompassing all phases of vertical transportation systems, and our diversified experience and skilled, professional personnel have earned the firm recognition as one of the world’s finest independent specialty consultants. Since its founding in 1980, VDA has provided services for more than 30,000 projects. The firm is Headquartered in East Hanover, NJ, and has 30 branch offices in most Major Markets from coast to coast, giving us the ability to be a local source near our projects.