DAL Global Services, also known as DGS, provides professional security and training services more than 30 corporations in over 50 locations in North America. Its division, DAL Global Security, offers security officers for nearly 13 million square feet of office and industrial properties. The company offers a range of aircraft ground handling services, such as cabin, passenger handling and ground support equipment maintenance. It provides expert witness services for civil and criminal cases in the local, state and federal courts. DAL Global Services organizes pilot and job safety analysis and accident investigation training programs. The company is a wholly owned subsidiary of Delta Air Lines.