Pile Dynamics, Inc. (PDI) is the largest manufacturer of foundation dynamic testing equipment in the world. The firm was founded in 1972 following pioneering research at Case Western Reserve University in dynamic pile testing and the invention of the Pile Driving Analyzer® (PDA). PDI has a team of civil engineers, electronic engineers and software developers who continue to improve and expand its product line and capabilities in addition to offering deep foundation educational programs. The company has a wide network of sales representatives spread from Asia to Europe to South America resulting in the use of PDI products in more than 100 countries throughout the world.